$25 BUDGET MULLET!! // Shimano GRX + XT
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- čas přidán 27. 01. 2024
- DIY Modification: XT cage installed on a GRX 812 11-speed derailleur lets you shift through an 11-51T cassette. No tan pans, no goat links, no 3rd party components!
Update (yes, with properly sized chain)
• The Rear Derailleur EX...
Parts used:
M8000 XT SGS cage, Inner (Y5RT10000): amzn.to/3SdC2S0
M8000 XT SGS cage, Outer (Y5RT98090): amzn.to/48OUh7u
GRX 812 RD: amzn.to/42cUX44
Same result, different approach:
• It Works!! // The $127...
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I love mods like these, I've been gravel riding for 3 years now with a 52t cassette and 36t chainring, these gears are 100% required for any gravel climb.
I agree, your setup is about 19-90mgearinches if im calculating it correctly. I have a Topstone w the GRX 800 and a wolflink on a double. 46/28 up front w a 11-46 cassette and I have 17-115 gearinches.
@@GasmanA nice! I think I would need you gearing if I was doing bike packing
36-52 is a common MTB setup
@@GasmanA is such low gearing necessary, or would you just end up spinning out even on a loaded setup, or perhaps too slow and lose balance, or even just too slow at 3km/h and might as well just walk? I wonder what is a practical low gear ratio
Great to see another episode of this conversion series! Thanks again! :)
This is a very helpful tip.
And we need more videos like this!
Well done with sufficient for us DIYers to do successfully. Thanks
Thanks for diving deep on all shimano mullet set ups. Very useful info since this trend is still being discovered by most.
Using this exact derailleur setup on a 52-36 crank with 11-42 cassette. Works fine, just added 2 links to the standard 11 speed chain
Very detailed and well-organized presentation of a worthwhile kludge for ppl interested in fighting the good fight against the deliberate incompatibility issues Shimano has decided to give its customers for the past decade or so.... Awesome video.
This is EXACTLY what I've been looking for! Looks like I'm ordering some parts! Cheers
Excellent mod! :) Love how you've been doing those recently. Much appreciated :) (Those clutched RD are really way more involved compared to my retro/vintage STX RDs I usually work with :D )
Awesome video! I was considering this mod and your step by step instructions will be very helpful!
damn dude, that is a slick little mod, glad the parts have some interchangeability still across shimano's lineup.
as for installing that peg back on to the cage, you should tape it to the screw driver. So this way itll stay attached to the screw driver without needing a 2nd person or keep on falling out.
Seems like you could stick something, like a rolled up rag or a small cardboard box, between the cage and the derailleur to hold it open. Then, you'd have both hands free.
There you go. A block of appropriate size would work just fine 👍
Thats a simple and affordable way to get there! Nice video.
Yes! Been waiting for this
Awesome! That's why I LOVE this channel! 😎👍💯
Great conversion!!
For over a year ago we successfully built a similar upgrade, "bit" more expensive with Ultegra RX derailleur, Garbaruk cage and pulley wheels. But to further extend the range, we ADDED a GRX front derailleur and a FSA Gossamer pro 2x crankset, 30-46, works just fine. (thus even reducing the q-factor to 151mm and extending only by 3mm the crank length to 155mm for the kid)
That's interesting. Can you tell which Garbaruk cage is compatible with the RX derailleur?
That's a lot of range
@@thecleaner81 I looked our order up, it was RD cage for Shimano GRX 11s, though I can't tell a difference by the websites pictures from the (general) Shimano 11s, or if the Di2 versions (GRX Di2 &, XT/XTR Di2) are differently shaped. Note; Manufacturer's website says 1x only - never mind, don't be afraid to try and check with your chainline. 2nd note: we tried at first with the standard GRX pulley wheels, but in the largest (and the smallest?, can't remember) cog the - unfortunately very nice but no bargain - oversized pulley wheels by Garbaruk were better, no chain rub at the cage.
Don't you have a lot of redundant/overlapping gears with a big cassette and 2x cranks?
@@peterscott4183 theoretical probably but out in the field, it doesn't matter and nobody cares. Once the chain line gets too diagonal and the drivetrain too noisy (chainrub on FD and cogs), you don't have to, but usually simply switch rings. With those wide range cassettes you then basically have two 1x setups where you optimize the chainline. Bottom line, we don't shift in an mathematical sequential order if gearing, but how it makes sense in the terrain. Width of range without converting to 1x12 on Shimano HG was the goal and we have it. Once it gets really steep, you're in the small ring and that's it. The bike originally was equipped with a 32T 1x chainring with let the kid always be the slowest esp. in combo with the small wheels whe upsized a year later when he grew. So much better now, he's confident, reasonably quick among the older/bigger riders and foremost happy riding.
Good work man!
cheers!
Great tutorial. I followed it and put a Shimano Deore CSM5100 11/51 on, after some tuning errors on my part, corrected on the 2nd ride, it works great, I don't notice any noise on the lowest gears. It feels faster/smoother than the stock Sunrace 11/42 though I've only a sample size of 1.
Before my 1st ride I did add 2 links to the 116 HG701 I was running while the bike was in the stand as it was making noise in the lowest cogs, it also seemed the top pully had little contact. It did seem to reduce the noise in the stand but that could have been my initial tuning error, or because I was using Hope pully wheels rather than Shimano.
Thank you, you've transformed my ride.
Another awesome mod. I wish I had seen this earlier.
Fantastic idea. My second hand gravel bike came with a Garbaruk setup to get a wide range 11spd. If I were doing it myself, this is a much cheaper way to get the same end result
But then you wouldn't have those big, sexy jockey wheels
Excellent information. Congratulations.
I did the same just with the GRX crank and all deore rear d and cassette - now on the micro spline body
I am running this in 2x on my gravel bike. Rx600 46-30 crankset with a 11sp 11-51T on the rear using the grx 822-sgs derailleur. The 12 spd derailleur works acceptably with 11 spd shifters. The gearing range is amazing when bike packing on steep sections without sacrificing top speed.
Wow, that's a great combo!! Is the RD total capacity enough to use all gears?
All but small and small, but the chain alignment doesn't allow that really anyway. 46 front in 11T rear and 30 front in 51t rear works fine.
Got it! Thanks for the info!!
GTK! I'm planning to run an 11-speed 42-11 with 46-30 cranks, RX-600, and GRX-812. First I'll try it without this cage replacement, but I happen to have a spare M8000 off a cracked frame.
@@shreddagorge I've run 10-speed 11-42 with GRX FC-RX800-2 48-31 cranks with the GRX RD-RX400 RD (which has the SGS cage already) and claims "only" 36T max cog and 41T total capacity.
I've used this mod to allow me to run a Di2 RX817 with 11-42 and 48-32 Absolute Black Super Compact oval chainrings. Couldn't get enough chain tension with the standard cage on the 32 ring/smallest cog (Di2 doesn't allow you to engage the smallest 2 cogs anyway). But with this extended cage, I can get all gears (minus the 2 smallest) working fine. The RX817 is, in theory, 1x only but I found it works fine, it just doesn't do the semi-shift thing of moving cogs when you shift between big and small chainrings. The front derailleur still auto trims.
I'm going to do the same mode to a second bike I have running 1x RX812.
Many thanks.
Great video! I would love to see something similar for a SRAM XPLR ETAP drivetrain
Nice stuff !!! I have a GRX810 RD, I wonder if this would still apply, or if there is anything else different other than the cage for the 2x version of the derrailleur ...
Giving this a go now, after the rx822 not so good results…
One thing is for sure 1x with an 11-51 cassete is awesome !!!!
When I installed the single chainring I put it in the INNER position, so the chainline to the biggest cogs is fine.
I tested with a string and it was the best solution in my case. Depending on the frame you might not have clearance for a big chainring there, but in my frame it fits fine up to a 44 or so.
Been using this mod for 2x11 setup. 36/22 front and 11-46 rear easily. Now that's some range...
Damn!,that went well!!😊
hold on, did you ride the GRX 812 with two chainrings?
i was thinking of doing that but everybody tells me the proper way to do it is to get the GRX 810
the video was awesome thanks. subscribed!
You could also buy a GRX RD-RX400 which already comes with the SGS cage and a very conservative claim of 41T max capacity and 36T max cog. I've used this on a 48-31 x 11-42 setup.
This. Rules. Thanx!!!
Woha, thx for this hack! Like it👍🏼
Nice idea with the cage of the Xt. When you set up the Rear derailleur, the small grey shifter have to be ON.
The clutch? I prefer to index without the clutch on to eliminate the variable of additional stiction
Ok,but for the enclosing angle the clutch has to be closed. But everbody has their own mechanical Style@@TheBikeSauce
Have this mod for almost two years, but on 2x setup - works flawlessly! Had to install a smaller 11-42 cassette, though. With 11-46 I have to compromise either extreme biggy-biggy option, or small-small because of the capacity.
What chainring combo were you using?
@@drucyphr it's grx 810 double chainring: 48-31
Did you use the exact same parts, RD and cage as shown in this video? Was also thinking about extending the range of my current 2-by GRX setup
@@MrSchoeppel same question. cheers
@@MrSchoeppel yep, XT M8000 SGS cage + GRX RD-812 derailleur + much longer chain + b-screw adjustments
Gracias por el vídeo. Pondré un 11-51 con plato ovalado 38 y cadena nueva. La cadena la mido normalmente con el mono plato y piñón más grande y le sumo dos eslabones. Al tener la pata más larga, tengo que añadir algún eslabón más? Gracias
I did this same mod last year on an 812 RD to give me more chain wrap capacity on my 2x GRX setup with a mid size cassette. I now have the 46/30 on the front and a 11-42 XT cassette on the back. It works fairly well, but I think you could still use a stock 812 and just avoid the small-small(s) shift locations for an expanded range 2x.
Exactly what I'm trying to accomplish. RD-RX812 (with M8000 cage mod) with an 11-42 M7000 cassette and GRX 46-30T cranks. Can you elaborate on the "fairly well" aspect you experienced?
Have you make that with the rx810 last year?
I used an 812 derailleur because the parallelogram geometry is designed for larger cassettes, I did not try this mod with the 810. I say fairly well because it was quite fiddly to get the b-screw just right. It looks like the XT cassette has more heavily profiled teeth compared to the 11-34 road cassette and I think that contributes to some of the clunking on up shifts. I notice it in the stand, but not on the trail. Or maybe it’s just the bigger jumps between the cogs.
@@dgc-3554 I've been running a 2x 810 with an 11-40 rear using nothing but a Goatlink. TBH I probably didn't even need that but I don't like the idea of the B-screw falling out.
I have an ultegra groupset that i am planning on turning into a 1x! Do you have any recommendations to get a good range with that der? and possibly what parts I will need?
Thanks a lot!
I did not have luck trying to dial in the RX822 on my 11 speed setup with the 11-51t cassette. This looks definitely doable. I would love to hear which mod you think works better (RX822 12 speed vs. this). I'm ready to give another try with the 12 speed derailleur, but if this works equally as good I'm in!
Would it be possible to get an update on how this setup has been performing now that you've put a number of miles on it? Also, how is the shifting performance in the smaller gears?
Stoke to try this if it's what you recommend for getting a bigger cassette to work with a GRX600 drive train.
Nize „Hack“. Reminds me of running 105 on downhill bikes, to Safe cagecosts
This brakes my mind and decades of mixandmatching shimano derailleurs... Derailleur total capacity (read cage length) was never a limiting factor for bigger cassettes, but upper pulley offset is. 11sp XT uses GS cage for 1x11-46 and SGS for 2x11-42 - it is needed to make up the slack of front shifter, not to allow for a bigger cassette. If anything, a GS cage of deore 5100 is the right answer for 11-51 cassette.
So if SGS from XT 8000 helps, you should have gotten by just fine with original GRX 812 GS, only being careful with chain length and B-tension. You can also see how much more movement of the cage is left in the smallest sprocket of the final build.
GRX 812 also works reasonably well up to 46t with no modifications whatsoever (not even a goat link). That's what I've got on my commuter/gravel bike and it shifts smoothly enough for my liking.
I was running 46t w GRX812 for a long time. 40t up front was just barely not enough for me.
I am using 51t without any modifications.
Hello. I really liked this modification. Congratulations on the idea and thanks for sharing. One question: Does this cage also work on the GRX400?
Would love to know too!
My 1x11 with grx822 from last movie work now very well. But it needs a shimano chain.
Would such a mod also be feasible for 10 speed road derailers?
My old Gravelbike is desperate for better gearing and this looks just like what might help
i notice some discussion around 2x set ups. i found the grx 11 speed rear mech actually takes a 11-40 quite readily. with a 46/30 chain ring, ithe 30 to the 40 will be sufficient for many.
I have been wondering this, if it would work. Would be nice to see someone test it out in their cave of bad ideas. 😄
@@positiivi_temeI’ve see several people on Reddit saying it worked. The 11-40 is in my wishlist (I’m currently rocking the standard GRX812 2x 46-30 setup, with the 11-34 cassette)
It worked for me, I have the GRX 812 RD with 46/30 front and 11-40 rear. Going to try the same thing with the GRX 400 soon
I'm using the same 1x11 and 11-51T cassette on my Cube Reaction Hybrid eMTB, but with a 38T chainring. It's a LOT of range. Mine came with a Deore 5100 SGS derailleur. It uses a long-ass chain though. It's over 120 links.
Probably an stereo full suspension.
An reaction has an relatively short chain.
Btw if these parts wear out fast you can swap to cues 11 speed. It does require a derailleur and shifter swap for 2-3x more service life.
@@barneyklingenberg4078 That's exactly what my next upgrade is going to be. I've been watching videos on Cues and they seem perfect for ebikes. Those thicker teeth on the chainring will be very strong. 300% more life apparently. I really should have done it already when my Derailleur got sucked into the wheel lol, but at the time I didn't really have the money, so it's on my list.
I did something similar after crashing and rebuilding my 10-speed Di2 RD with a long cage and Wolf Tooth and 30-11, but couldn't quite get 32-11 to work. (Also, I believe that SRAM chain you have is made for them by KMC... oh and their X11EL is excellent).
Awesome! Would this work with the di2 derailleur?
Would it work on the 812? I think the m7000 is to short.
Would that not be the same like a garbaruk cage?
I'm not sure if it is just me, but it sounded a bit noisy in the other gears too, didn't it? Maybe non ideal mic placement. Would it be worthwhile to shim the chainring a bit?
Wow! So, basically you put XT derailler cage plates on your rear derailleur? Will this modification, XT cages on a Dura-Ace derailleur also work?
Great idea, do you think any hack for 105 r7000 diraler?
Super cool explanation and video, as always! Does anybody know if you can do that with the RD-RX810 as well?
Would this new setup be backwards compatible with the grx 810 recommended cassette? Asking as I think it’d be cool to have two wheel sets with the wider range and original cassettes to swap every now and then. Cheers.
One other question I had… can I do this to the GRX 400 series derailleur?
Pretty sweet! Nice idea! Wonder if I can swap my Deore with an XT cage to allow a 50 tooth, instead of my 42. (10 speed) Might have to add a drop hanger....
it depends if the outer cage is riveted to the clutch axle or bolted to the axle. If bolted, have fun
Which solution would you say works the best in terms of smoothness, quality of shifting, this or the grx 822 12 speed derailleur mod? 😁
You can achieve the same result without the need for disassembling the derailleur: replace the first joint of the GRX derailleur (the one that bolts to the hanger) with a WolfTooth RoadLink. Done.
I've just purchased an M8000 XT rear. Im kind of torn on selling it and going the the M8100 12 speed because of the better shifting. Will I gain much more? My bike is an all round computer bike for all terrain.
Great video.
I’d love to do something similar with my GRX400 10 speed derailler. I measure the gace on my derailler and it is about 106mm pulley to pulley. Are you aware of any even longer cages that may fit my GRX400? May be nice experiment for video.
The rx400 is already a long cage. But you could mount a rx812 instead of rx400. Its the same cable pull ratio.
Rx400 is only a downbranded rx800 derailleur
is it possible to use a different cage for this hack? Currently Shimano and all vendors across the US are listing the outer plate SGS cage has sold out/out of stock. The amazon link listed in the description is the only one that I can find that has it in stock at double the price. The only option left would be to cannibalize a brand new M8000 XT Derailleur itself which is readily available.
Do you have a ‘cheap’ mod for SRAM Force 1, currently 42 front & 11-42 rear but be nice for 44 or 46 on the rear?
The only time I felt the missed benefit of 1x was during a monstercross event, when my 2x 105 setup (gravel bike was pre-GRX) dropped the chain a couple times, but I don’t do those events often enough to justify a switch. If I did, going to the Ultegra rear mech with clutch might do the trick. This hack looks awesome though.
As it is, my 105 handles 11-40 and could easily manage 11-42. This is with a Praxis 48/32.
Do you use a Wolftooth or something to fit the 11-40? I have a GRX RD-RX810 in the back which (according to Shimano) should shift to max 34T in the rear. An 11-40 with a 46-30 in the front would be real nice for the steeper climbs around here.
No, no Wolftooth bit, b-limit adjustment sufficed. I learned this from Russ’s interview with Grant Peterson. He said Shimano is very conservative with such things.
Love the experimentation! Thanks!! Probably could use a couple of extra links in the chain and that chain angle on the big cog on back could get interesting, though.
Like previous comments, I put a 11-40 XT cassette on my 2X GRX 810 that was supposed to have a 34 max cog I think. Didn't really like the way the B-screw was sitting (although it was probably fine) so I got a goat link and the screw now sits flush on the tab - and the system works flawlessly. Curious how much larger of a cassette I could actually put back there now!
I'm not in the 1x camp and don't think I ever will be. 2X is much better in my view.
Yes, he can benefit with longer chain.
I'm also in the same setup. Not into 1x as it seems more limiting and I have 11-40 with only unwinding the B-scew.
Yea, this chain was stock length off the GRX 2x (11-32, 31/48) I think. An extra link would probably do it. New chain is already on the way.
I am also in the 2x camp. Tried and 11-42 cassete with the GRX810 (with direct mount goat) and it kind of worked, but shifting was not so nice.
I didn't have a 40 cassete to try out ... currently running an 11-36 with 32/48 out front.
Think is, I also do a bit of road riding on the bike, and the small cogs get used, on the larger cassettes, the 11 to 13 cog gap is very noticeable.
I found out that the SUNRACE 11-36 cassete still has 11-12-13 on the smallest cogs, which is perfect for stretches of road, and then it gets bigger for offroad :)
Just throwing in my experience: running a 11-40 in the rear w/ a GRX815 Di2 derailleur, mounted to a 10-speed goatlink. Front is 46-30 AbsoluteBlack oval chainrings. Everything works great and I've got good range. My fitness is the determining factor before gearing in most instances.
Frisbee singles definitely have the tard look while sacrificing range🤷
Could this mod be done keeping the 2X with a longer chain?
Nice, but you need a longer chain and the clutch should be engaged
I'm happy that nosy Google, after finding the short on Instagram, also showed me this video on CZcams, thanks to which I will make such modifications😂😂
Very cool! Was just looking around to see what these parts would cost in Canada, unfortunately I cant find them and everywhere in the US (that will ship to Canada) is out of stock with the Outer Plate.
Definitely interested in a follow up video on how it performs. Would also be curious about other cassettes, like an 11-46 or something, perform.
Yea I’ve still got to get a proper chain at the proper length. I’ll do an update video soon
@@TheBikeSauce The best I could do with getting the parts is March :D that Outer plate seems to be out of stock everywhere. Anyways, thanks for the response.
Sweet!!! Do you have any idea you can reproduce this in a 2x setup instead ?
I'd like to extend my 11-34 11sp cassette up to a 11-40, 11-42, or 11-46 using a DEORE XT M8000 Series cassette and keeping my GRX 2x chainrings 48-31.
Thanks for sharing the video and your time explaining the procedure
I am running a 11-40 cassette using a goatlink 10. Works fine for almost 2 years now.
@@markobolt9030 regardless of speed, do you think 40t cassette is optimal for 2x, what's left is but size the right chainring upfront, be it 46/30 or 42/26 or whatever is required and within the derailleur capacity?
hi, so i lived in a country where importing something abroad will cost me so high in tax
and the buying the whole package of M8000 just to switch the cage is quite expensive
do you find any other Shimano RD MTB long cage that compatible with GRX 812 RD?
Just wondering if you know what the pull ratio is on a Shimano 12 speed derailer? Is it the same as the 11 speed?
Any chance of doing this with the 810 grx? Heck, can you try this with a 2x for infinite range and see where the capacity actually holds the setup back?
Haven't tried with an 810 but rx will get to 46 on a 2x.
Would this work on GRX 11spd mechanical to go to a 11-46 aswell? Currently on a RX-812 rear deuraillier with 40T / 11-42 cassette.
Would this mod work to up the capacity on a 2by system also?
Can I run 10-51t 12sp cassette (assuming I have Microspline hub) with the modified 11sp GRX derailleur? I hope to setup this way to be future-proof.
IM SO GONNA DO THIS>
Can you do this with the short cage Shimano 105 rear derailleur? The max I can get on it is 11-30t cassette
Great video. Question: Wouldn't a Shimano Deore Deore RD-M5100 derailleur (USD 40) work as well? A simple swap and not that much more expensive?
Shimano MTB and road/gravel rear derailleurs have different pull ratios from 10 speed and up.
A GRX cassette and a MTB cassette is the same. Wouldn't that meen same pull ratio?@@neilgoth1974
This is moving in the right direction of my search for mullet drivetrain but what I want to see is, will the latest grx 820 12 speed shifter paired with any existing mtb deore to xtr 12 speed derailleurs.
The latest grx 822 rd can already handle 10-50t cassette. It’s just the brifters are pricey..
Should this also work with a Shimano GRX ST-RX600 derailleur?
How many links did you use? Kinda wondering if I have to order 2 chains with this mod. Thanks
Can this mod be done with a different cage,? the XT 8000 cages seems impossible to get here in Canada
A garbaruk selling website led me here 😂
Also: is it possible to install a 12s cassette and shifter after modifying the derailleur like this?
Are they compatible with 11s crank and chain?
I'd love to see if that works, since it saves one from buying the new derailleur and rest
Would this also apply to the grx 400 derailleur? Also, I have considered 650b for my diverge but thought that the BB would be so low that I’d end up pedal striking more often. Have you had any issues with that on 27.5x2.1” tires? Thanks!
A 27.5x2.1" tire has roughly the same circumference and diameter as a 700x35c tire.
@@ExploreVeloService thanks!
Hey brother,
Do u have any suggest to a good budget upgrade to a poseidon ambition x derailler?
I've taken it to 2 shops and can't get good shifts out of it. When im on my high gear and i peddle back a bit it feels like the chain is getting hung up on something. Any help would be greatly appreciated!
I’d start by checking the hanger alignment. Also, reach out to Poseidon- they’re helpful and responsive
This might be something I have to try for my GRX400 rear derailleur. I've been running it 1x with a 42t at the back and the wolftooth link.
Your GRX RX400 RD already has the SGS cage (at least mine does). You don't need to buy anything.
Would be curious to see how it feels on the ground riding different terrain. 12 speed chain to minimize noise? The XT cage seems a much cheaper option, but the question for those that want precise optimal shifting with that big of a cassette becomes...garbaruk upgrade or spend roughly the same for the newest 12 spd grx derailleur? I think the answer for me is 2x haha
Haha if you want smooth and quiet, 2x is always the answer. Chain angle on any 1x will introduce noise
Does this work with the GRX 820 12 Speed Derailleur?
Would this hack work with a R8000 rear derailleur?
From my point of view the chain is just one link to short in the current configuration.
The new cage increases the chainlengh by approximately one link, so what's the point?
Yea ppl keep pointing it out. It’s what I had on hand. An old sram chain. I’ll update with a new 11 speed shimano chain at the right length.
Would this work on a GRX 810 as well?
i don't really get this set up quiet. there is a rattling noise i can't eliminate on the second and third largest chainrings. anybody else have this issue?
The manual for GRX812 indicates 8-10Nm to install the plates, isn't 2Nm too low?
I'm curious if the 822 plates would fit the 812.
Good question. I pulled the 2nm spec online. 2 seems questionably low. 10 seems ridiculously high
@@TheBikeSauce yup, for a 4mm allen key 8-10Nm is high, I usually go for 5Nm.
Hopefully you get to test if the 822 plates will fit the 812.
And the next video is the r7120STI with rx812 sgs cage on 51t mullet build. LOL
It's an old trick, rx812 is just m8000 GS with road bike STI pull ratio.
Just chsnge the plates on rx812 by M8000 SGS cage plate, you can have a road bike STI compatible m8000.
And it's the same as the RX822.
And also there is a very very rare r7000sgs on the market, it's not on the official site or spec manual. Only r7000gs listed. It can compatible with 36 or 40t cassettes.
No need to swap the 822 cage. It can already handle large cassettes
I mean the rx822 is the STI cable pull ratio M8100 GS or SGS.
You my friend are an artist. However, even the SGS cage for M8000 is only rated to 46t. I know Shimano are conservative when it comes max large ring but are you sure this works with the 51t?
I tried the Deore 46-11 with my Di2 GRX unmodded and although it worked, it rang like a bell and I had to ditch the idea. I intend to try this mod though as it looks like the M8000 cage will fit but I'd like to hear a follow up on how good or bad that 51t cog runs.
Will update soon. I’ve got a properly sized shimano chain on there now and it’s better. But of noise, but not much more than any of my other 1x mtb setups. Able to backpedal really fast with no indication of dropping the chain.
@@TheBikeSauce That sounds promising. I'll let you know how the Di2 experiment goes.
You can make the same upgrade with sram 11s
what would you guess, could be the highest gear on the casette with a two by 48 31 chain ring?
Highest gear on the cassette isn't the issue. It's the range of the cassette combined with the front delta (48 - 31) that'll be the limiting factor. People call it 'total capacity'