Installing a Coil Shock on my Stumpjumper EVO
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- čas přidán 13. 06. 2024
- The Specialized Stumpjumper EVO is an extremely popular mountain bike, and we're consistently helping our customers with upgrades on these bikes. So I (Mike) built up a Stumpy EVO to ride and better assist customers with their questions. Tons of people ask if a coil shock will increase the performance of their bike, so in this 3 part video series we aim to answer the question "Should I put a coil shock on my Stumpjumper EVO?"
In this first part of the series, I install a coil shock on my Stumpy EVO and go through the process of using a spring calculator and sag measurements to find a "starter spring" for this new coil shock setup.
Subscribe so you don't miss out on Part 2 and 3 where I ride it and review how it feels!
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0:00 - Intro - Sport
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The strut mount layout is definitely a killer. I was running my air shock at 30% sag (prob too much) on a short travel stumpy and broke the damper shaft on a hard bottom-out.
agreed, every other bike including Specialized Enduro, Status, Levo, etc... all got a shock at centerline. This off center skewed shock design sucks. I do love my evo though, just wish they would redesign and fix it.
It’s centered on the new levo sl, keep eyes open for an evo refresh next year 😉
@@The_Backsmith802 yep I saw that here's to keeping fingers crossed 🤞
RS says they’ve done testing on the Stumpy Evo and they say the new coil with increased bushing overlap and larger diameter shock body works
Are the older SJ bikes with the 27.5 wheels circa 2019 problematic with the shock breakage as well?
I have been searching for a video on this for so long. I appreciate the upload!
Awesome! I'm lookin' forward to getting Part 2 and 3 up 😃
-Mike
God bless you for making this video, just bought a coil shock for my stumpy EVO yesterday and there is little to no information or reviews on yt on this!
Nice. When I upgraded my stumpjumper I asked the specialized people if a coil shock would be okay to use. The guy that I spoke to with did not advised to do so because it not really designed to be used with a coil shocks. Also, there are stumpjumper owners that have had shocks that snapped. I think it is just how the suspension lay out is of the stumpjumper. With that I picked a DVO topaz and onyx as an upgrade. 😊 Thanks for this helpful video 😊
can't wait for the second part :) besides the side-to-side stiffness (or lack of it), what about the progression? I have close to zero knowledge there, but I heard multiple times the stumpy suspension design works better with progressive shocks.
I subscribed because your new haircut is pretty good. Also my son and I both love our SJ Evos, they can do pretty much everything as a good compromise.
That is some sweet build kit!
Great video all the way around!
at 70-73 kg rider weight 450lbs was spot at 30% for me this shock works AMAZING on this bike!
Heck yeah, glad you found the sweet spot for yourself!
-Mike
You got the new RS Super Deluxe Coil? You are 70-73kg with or without "Gear". Im about 73kg naked... 😅
The most interesting thing I noticed when I did this to mine was the added comfort on long rides. It added damping to all the contact points making the bike feel smoother over any surface.
That small bump compliance translates to all parts of riding, and dang do we love that comfort! Glad you're enjoying the coil life! 😎
-Tor
Would be interested to see you throw the cascade link on there and see if you notice the progression / travel increase
Same. I just put a CL on my Evo and I really like it. I'm on the heavy end (235 geared up) so RS doesn't make a coil strong enough for my situation :( I'd need a spring in the neighborhood of 800#.
FWIW, I like my DVO T3 Air + the CL. Great tunability.
Yo I did the CL and Push coil combo on my Stevo (not recommended by Push) and its pretty damn sweet. Super supple off the top but not bottoming out much at all now (with a 50lb bigger coil on it though). It does make it a worse climber in my opinion though, more supple has led to more pedal bob.
I can highly recommend the sprindex. It's an adjustable spring, so you can just try different weights. Also you can tune it one fly, mid ride.
Huge fan of your work and didn’t know you own the shop. Just want to congratulate your hard work, and I hope your business rises like foam. You deserve it dude.
Mike has excellent taste. That bike is spec'd PERFECT.
Early SJ Evo's came with the DHX2 and there were tons of failures. My SJ Evo Pro came with the coil stock, I had 2 rides before mine blew up. Sent it to Fox for warranty service and they advised not to use their coil shocks on this frameset. Replaced with a factory DPX2 at the time and haven't had any issues in the 2 years since and thousands of miles.
I hear that with SJ Evo you are extremely limited in what coil shocks you can use. Almost making it pointless to even be able to use one.
Great news I am following how this story unfolds.
Worth noticing is the first pictures of 2021 Stumpjumper EVO LTD was with coil. Once ready for production the coil was gone.
Yeah my 2021 LTD came with a rockshox super deluxe select + instead of the coil. Ended up putting a Push coil on it though and its awesome!
Nice!
Would love to also see a cascade link on this bike😊
awesome video. i had a dhx on mine until i was talking with spesh and they told me that shock is a no go... so i got sad and sold it thinking it just wasn't compatable with any coil. but this gets me excited again!
Heck yeah! Luckily there are some options out there that are rated by the manufacturer to work with this platform.
-Mike
You need a Springdex spring to get you dialed in
I like how I can adjust for weight
Like when I’m carrying a Hydro pack just dial it up a few clicks
Easier than an air shock actually no pump to carry!
I’m a huge fan of coil. To hell with the weight, coil me up!!
Hey Last Co.
Great video again, thanks a lot....
I am thinking about buying Stumpjumper Evo frame and put on it coil shock, like you did it already.
The main problem for me is to choose right size. I am between 5′ 9″ and 5′ 10″ and not sure what to choose S3 or S4. Specialized size calculator chose for me S4, but I am afraid that it will be a little big for me(reach is 470 mm.). Also I can't find these sizes to try it.
Can you share your opinion about Stupmy size and handling?
Thanks in advance
I had the same experience with coil calculators with my evo. Most apps have me at about 25 to 50 lbs more (525 or 550) but I run a 500 lb spring (storia EXT) and get 29.5% sag.
What is your weight?
RS SDU Coil MY23 needs much softer spring that any calculator suggest. I weight 85kg and I need 350lbs spring to achive 30% sag (measured seatted) at my Transition Spire. Every calculator suggest 450lbs.
Turbo Levo SL Alloy + RockShox SUPER DELUXE ULTIMATE COIL RC2T 210x52,5 - with HBO. For the exact same reason - Fox Float did not hold up well the side-loads, but this one does (for now), the spring is 600lbs, stroke is exactly 52.5 (as stock Fox Float). Bike 21kg + rider 97kg + backpack 6kg. More flowy trails than jumping - sure - but it seems rigid as f. yet it does take out uwanted bumps well! I am still dialing in all of the settings (pain in the butt). Coil fits near strut arm and leaves 3mm not more.
Yo! Got same frame, with same shock and fork. Running now about 3 months and everything's fine! Could you share how you endend up setting the bike? Hsc, lsc, rebound, hbo of fork and shock? Pretty curious! Thanks
Good morning, I read that there are two possible rebound choices when purchasing the rc2t shock absorber. linear or progressive. which one do you recommend for a stumpjumper evo elite alloy 2022 equipped with mullet?? Thank you for your response and sorry for the English I am writing with the translator. good ride from France 🤟
Love the idea of running a coil again, this vid is really helpful. Down here in New Zealand, Specialized NZ have advised that if a non-standard shock is installed and the shock breaks and damages the frame they will not warranty the frame. Is that the case elsewhere?
Ya by what I've been told I think its just better to use another brand than specialize if you really want to use a coil shock. Being shoehorned into only a few shocks specifically made for that frame isn't what I call an ideal settup.
Great, which rebound tune has your shock?
Yes!
I have a dvo onyx D1 and looking to run a coil rearshock on my specialized enduro. Aside from looks, Which one would you run on your bike? my two choices are the super delux ultimate coil or the dvo jade x coil. I'm leaning towards the rockshock because is more adjustable like the dvo D1 fork but I would.like to hear your thought, fire away....
On my bullit cc has rockshock older version, but if i change it for the 2023 it wont be tuned for my bike then.
If you have a cascade component link does the coil shock size change or would it still be 210x55?
I figured my dhx2 would be OK because it doesn't have the rebound knob on the end of the shaft. I'm thinking it's not hallow because of that making it stronger.?
I was thinking about coil shocks a lot right until I got the Stumpy Evo.
mike can you take it to whistler or a dh bike park
Im curious how much it can take
thanks
Does anyone know if this larger amount of side loading also found on the Spec Status 160? If so is the list of "approved" shocks the same for stumpy and status?
just installed RS SUD coil on my stumpie evo 2020.. need few more ride to dial up correctly..
Lots of good info for people thinking about running a coil on a Stumpjumper Evo. I ran an Ohlins coil on a Stumpjumper Evo with a Cascade link for a year. It worked pretty well but I'd say the bike isn't ideal for a coil because of the yoke and high leverage. Heavy riders (over 200lbs) beware. On the Stumpy Evo I had to run a 674lb spring! A number of people I know also broke their coil shocks in half on Stumpjumper Evos. It's a great bike but I ended up selling in favor of a bike optimized around coil shocks and high volume air shocks.
My EXT Storia has been great on my Stumpy Evo. Cascade link with 600lb spring. 180lb riding weight.
Seems like the stumpjumper geometry makes it really hard to use any coil shock. Their enduro bike that uses a coil shock is a special shock made for that bike, and its in the lower part of the frame instead of the upper part. It's still horizontal instead of vertical like other frames have. Now i'm glad I got a Fuel EX gen 6 instead of this bike since it doesn't have that problem.
For anyone looking for someone whos had luck putting one through the ringer - I've had a bomber CR with cascade link for 1.5 seasons on my SJ Evo, probably 25 bike park days / 25 trail days and havent had an issue (yet?). I've smashed a rear hub to bits and cracked a frame bolt with the shock on so I haven't been riding gentle. I weigh 180lbs and run a 550lb spring for reference. Also running a full 27.5 alloy frame which may or may not make a difference on how much side loading makes it to the shock.
Really nice video! I'm wondering about the reference list @2:41 as the 2020 Evo TLD Limited was equipped with a FOX DHX2 Performance Elite.
And that's when things started blowing up... Yes, it shipped with the DHX2, but Fox later issued a statement saying that this was incompatible.
I think Stumpjumper EVO LTD came 2021 with Rockshox. Don’t think it was a SJ EVO LTD 2020. You got the TLD Limited wrong since LTD means Limited.
@@rookieboy9203 my 2021 Stumpy Evo LTD came as a mullet and was supposed to be coil in the rear but they changed it kinda last min to a super deluxe air shock. Ended up with a Push later
@@SnowShackboy Yes same as mine I guess they did a last minute change.
On your build; what made you decide on the XX transmission vs. the XX SL transmission?
XX SL is XC-oriented with hollow carbon cranks, and the XX cranks were more applicable to me as I ride in the aggressive trail/enduro segment.
Got my Stumpjumper Evo Pro about 4 weeks ago. It's a great trail bike!
I agree, I think it's such an awesome and versatile bike for the couple of months I've spent on it.
Does anyone know where I can get the ultimate coil 230x62.5? Everywhere is sold out
What's up mate! Can I install a Cane Creek DB Kitsuma Coil on a stumpy Evo?
Need to know if I need a coil is worth it over the air
Your calculator seems set up for Horst Link and VPP bikes and would be way too stiff for DW link or single pivot bikes. At least based on a comparison to the TF Tuned calculator which has rates for both 4bar (Horst) and DW link setups. For the Evo which is Horst link it should be close though.
There really isn't a lot of voodoo to get close with spring rates. Just multiply the rider weight by the leverage ratio off the top and you're there. Using 3.1 (stock leverage rate) multiplied by my rider weight got me within 4% of the number that the lost co's calculator did. That's close enough for me.
Interesting that Specialized says the DVO Jade X is a no go. That is the most common coil run on the Ibis Ripmo and Ibis even sold the Ripmo with that shock, and the Ripmo is also a clevis mount shock that doesn't play nice with Fox coils.
Is the ibis shock offset?
Very different linkage designs despite some similarities. The yoke length is half that of the Evo and it's also not offset/off center.
Specialized didn't say this, DVO told me this. Definitely a case-by-case basis as most suspension manufacturers require you to measure the link/strut/clevis/yoke for their compatibility check. I don't know much about Ibis bikes in general, but I'm guessing their shock link falls within an acceptable length.
-Mike
I wonder what made Specialized choose this suspension design. It clearly has a huuuge drawback. What is the advantage? Just packaging?
No advantages over other designs from good companies.
Mike talks about 50lb increments for RockShox, is it possible to use springs form other manufactures assuming it's the right size (IE: in this case 425lb x 57mm)?
If you also consider the inner dieameter of the spring, yes you can. Rock shox uses a 38mm inner diameter which isn’t common, but is also used by ext (in 25lb increments).
@@erikanzenmtb3124 do you know what inner diameter DVO springs are please?
Answered it myself, it's 36.5mm.
@@colincoulthard3021 just in case ...
The RS SDU air shock with SJEvo-specific tune is NOT available aftermarket!? 😢😢😢
Could one which is available aftermarket be re-valved to be SJEvo-specific????
Or should we wait on the SDU/Float X comparison? 🤔
Great review of the SDU Coil though! Epic information 😄
Yes sir, you can do that. Buy any you can find & take it to your suspension service center. You might have to ask specialized first to get the tune details.
Or you can just get it to you specialized lbs if they also service suspensions.
I run the DVO T3 air, which is available with a SJ Evo tune. I bought mine off the secondary as a take-off from a Ripmo AF, then sent it to DVO and saved about $200 off the retail price.
Yep, we can retune the shock for you in-house to whatever tune you'd like 😀
-Mike
I’m running the aftermarket tune. Can’t imagine the EVO specific tune being much better.
What are the specs of the RS coil shock? What size and what not? What do I need to order? Is it different based on size?
Hey John!
We made a whole separate video going over all of the specific specs of the shock and why we're huge fans of it. As for the size, it depends on your bike! Every bike is designed around a specific rear shock sizing, and it's super important to get the exact size your bike is made for. You'll be able to find that on the manufacturer's website and usually isn't dependent on frame size, but sometimes it is and that'll be made clear on the website. 😎
-Tor
@@TheLostCo thabks. I actually have the 2022 SJ Evo which is why I was asking. Thought you guys might have those specs handy. If not I’ll keep searching the interwebs. Thanks.
Hey speaking of side loads maybe you can clear up something for me, I always hear about the x2 not being trustable from tons of posts, someone claimed it was because of trunnion mount side load. Is that the factor in some people having to constantly get their rebuilt? Should I not be afraid of getting an X2 in my spec? I otherwise hear great things about their performance when they work and I wonder what the fix is to avoiding issues
I used to ride X2 for a couple of years, never had any problems with it except that it sucked. It was too soft with maximum tokens and like 300 PSI of air and felt like a wet noodle. It sucked reliably, consistently and with no maintenance required though.
@@YanDoroshenko Interesting, on what bike? I watch some people ride an x2 that still seem like they can make it poppy and fun but I do generally hear that it feels more linear like a coil
@@LastAphelion Probably those people are much better than me. I had it on YT Capra (2018 model, 160mm) that should've had really progressive suspension. Maybe my shock was a dud or something.
I've also heard funny stuff like WAO Arrival owners who swear a RS SDU coil feels poppier than their stock X2 so I do think X2 is pretty linear. I was thinking of people like Jeff Kendal Weed who is a power riding nutjob who could wheelie around the circumference of the earth and jib off every pinecone with a slinky for a rear shock but that guy is super human and not relatable lmao What shock did you swap to, I hear the normal Float X much livelier
@@LastAphelion I didn't swap, I bought a Stumpy Evo with Float X Performance and difference is night and day.
Still lots of mixed feelings on this but man I would really like to try a coil on my stumpy evo.
My Push 11-6 has been awesome on the Stevo!... it's definitely not worth their new asking price though. I'd just buy one used or get an EXT. I think Cascade Components will give you a deal if you buy the link and shock together, plus they tune it to fit the new link.
From past experiences coils on the stumpy doesn’t work out shocks would always blow air is the way on that specific bike.
I've heard that there are problems getting it to be progressive enough. Did you use a shock with a hydraulic bottom out?
I wonder if the suspension design adds (unnecessarily I guess?) side load to the shock, it would qualify as flawed or faulty? someone enlighten me please
The Stumpy uses a clevis mount shock, basically it's using the shock as a supporting member of the rear suspension. It's like the MTB version of a strut.
@@mrvwbug4423 Thanks for the info man. It still seems like a pretty sketchy suspension design to me since most shocks are not designed to handle an excessive amount of lateral stress.
Think the calculator needs new batteries 🤔
Tells me I need 753 lb Spring!? 😵💫
FYI - got a 600 lb Spring on there at the moment... Could go down to 575 lb's, possibly 🧐
Can’t wait to see the video when the shock snaps… I’ve got photos of my super deluxe in pieces … the Frame got chewed up from the coils, luckily I didn’t crash
Was is the current Super Deluxe (B1)?
I thought RS shocks r not compatible too?
Check out the chart at 2:40 for compatibility. Current RockShox Super Deluxe Coil shocks (B1 model) are compatible. Previous gens require some measuring.
Really appreciate you help Lost Co! I had a hard time understanding and reading that chart. Is the a larger image of it I could find somewhere?
@BossMan what's happening with your car chanel?
Nice video about coilshocks btw.
Yo! I just haven't had the $$$ to toss into that project. The car needs a transmission and tons of drivetrain components to successfully hit the drag strip.
-Mike
@@TheLostCo aww well looking forward to more video's!
Is the Specialized status compatible with the Bomber Cr shock?
Seem so many people this year try out a rear coil shock, not complaining though. everything’s got it’s purpose
#bringbackcoilshockswithlockouts
Weighing 155lbs and you need a 500lb spring 😳. From what I’ve read and ridden, Specialized always seems to go through its travel too quickly.
It’s pretty linear had to add a couple vol spacers. Definitely did not have coils in mind when they designed this bike
@@ASAP2525 I agree!
This is one of the reasons why Evo owners who convert to coil use the Cascade Link. It makes the leverage curve more progressive, but it increases the leverage ratio to almost 3.4:1 off the top which means you need an even heavier spring than normal. I'm running the CL with an air shock and had to add about 40psi more air to achieve the same sag as before.
@@pauld1848 It’s cool that you can modify it like that! However, at some point does it just make more sense to move up to a beefier enduro rig or something else that’s designed to play well with a coil?
@@Eric.V. Agree, except in my case I'm 6'8" and the Enduro isn't made in my size. Also, doing a CL on the Evo doesn't really make it pedal much worse and owners would have the option to swap a coil for days in the mountains and back to air for pedaling the trails.
Terrible idea. This frame has a very long yoke and side-loads the shit out of all shocks, which is something that coil shocks are very susceptible to because if their smaller-diameter main shaft.
Rockshox/SRAM even say that the Superdeluxe Coil isn't compatible with the Stumpjumper Evo because of the yoke.
The only coil shocks anyone should put on any yoke-equipped frame are the Öhlins TTX2 (because it is available with spherical bushings), EXT Storia (same) and the DVO Jade X (because it's got a very large diameter main shaft and is less susceptible to buckling).
did you watch more than 1 minute into this vid? this is what he explains
MRP Hazzard also has 14 mm shaft!
Outdated info, and the Jade X is not compatible. Also, while it is advertised as compatible, lots of people have problems with the TTX2 on this bike. The MY 2023 SDU Coil has been updated as being compatible for this application per RS.
Please watch the video a bit further as that is all covered in here.
-Mike
my dude.. you don't need a calculator to know that 500lb was WAAAY to much for you lol (You are skinny runt)
Unless you were just giving an example of what NOT to do..
You should be on a 300-350lb (400lb if you are doing extreme stuff) for 30%/25% sag.
Haha, I wish it was that simple! Weight doesn't directly correlate to spring rate in most cases. For example, I might use a 300 pound spring on a DH bike and then a 600 pound spring on a short travel trail bike.
-Mike
@@TheLostCo Sorry for my ignorance. I realised it was for different size shock AFTER commenting. Good video 😶🌫
😁🤦🏻♂️ I'm sorry guys, but the new axs transmission just doesn't look good. The best looking axs is the 2021-2022 lunar gray x01 and gx.
Personal preference, for sure! I think the Transmission stuff is pretty stunning in appearance.
-Mike