Your Tires Could Be Costing You Minutes. Tire Rolling Resistance with Josh Poertner
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- čas přidán 18. 02. 2022
- What tire and tire pressure you choose can have a huge impact on your speed. In this video I sit down with Josh Poertner of Silca to discuss how to determine the optimal tire pressure, what makes a tire fast or slow, and whether or not tire inserts increase rolling resistance.
Find your optimal tire pressure with the Silca Professional Tire Pressure Calculator:
silca.cc/pages/sppc-form
Find out which tires are faster or slower with BicycleRollingResistance.com:
www.bicyclerollingresistance....
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If wider tires have lower rolling resistance and assuming this does not apply to bicycle tires only, then that means putting wider tires in cars can actually improve efficiency?
Oooooooooooooooo
@@sepg5084 oooooooooooooooo ooooooooooooooooooooooooooooooooooooooooooooooooopoooopooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooopp
@@sepg5084 as it was said in the video, there is a limit in both directions. As far as i know, car tyres are already very very wide as the are optimised for grip, not for rolling efficiency. Look at the electric car tyres where efficiency (= range) is critical, the are much thinner :)
Let me know if you liked this style of video and if I should include more guests in the future. There is a lot more from this conversation that I plan on releasing.
Find your optimal tire pressure with the Silca Professional Tire Pressure Calculator:
silca.cc/pages/sppc-form
Find out which tires are faster or slower with BicycleRollingResistance.com:
www.bicyclerollingresistance.com/
Great content. Thanks. I am going out to lower my psi. lol
Great information and insight into tire/tube air pressures. Very interesting and educational. Thanks for this excellent material...
Hi Dylan, I very much enjoyed this style of video. I was hoping Josh/you would get into discussing the pros/cons of various tread types & tire manufacturers. I've been on nothing but Rene Herse tires for years -> Barlow Pass 38mm slicks which actually measure 43mm on my FSE 27mm internal width wheels... However, I've had my eye on some Vittoria tires as well. Thanks again for the great content!!
Your normal videos are better.
Bro you left me hanging! I wanna hear the second part
This is great. I love hearing people who know what they're talking about address issues that we usually don't have any good data on
There's lots of good data out there and has been for the last couple of decades. Guys like Tom Anhalt have been testing tires for the longest time...
I remember when Vredestein sold road tires with their advertisement that you can pump them up to 150 psi for decreased rolling resistance. It is interesting how things have changed.
Track Riders 150 to 200 psi
I always Ride @ 120 - 125 psi Clinchers Specialized Training Tyres
@@Robert-mn8gc too much
@@Robert-mn8gcwell, Dygert just won the pursuit at worlds running tubeless 25mm tires that were probably under 90psi
@@veganpottertheveganuh...no. 150+ psi more likely
@lunam7249 no, the beads would blow on the tires they used at 150psi sitting still. No way could they handle the force of the banks on the track
This was so useful. Used the linked calculator and found I was about 10 psi too high. Let the excess air out and sure enough the bike feels much better and no noticeable change in speed over the last 3 weeks. Thanks Dylan + Josh 😃
Right on! We ALL have left countless watts on the course because of this. I found the insert discussion especially valuable! A deeper dive on this would be great! 👊🏻💥
I was drawn to tire inserts (Vittoria Airliner) for a 28mm road bike rim. I don't compete, but I was looking for added confidence that my tubeless setup would not leave me stranded in a rural area - - where I live. At the time I was running Continental GP 5k (TL), and they were notoriously hard to acquire, and even harder to mount. The Airliner just made it impossible for me.
I never tried the insert with the Pirellis that I used to replace the GP5K's, but these are much easier to mount. In the end, with this new ease of installation, I have abandoned the inserts for the road bike, in favor of carrying a few patches, a boot, and an innter tube.
Love love love this content. This channel is all about getting faster in a practical data based way. Give us more!
I'm a big fan of Josh Poertner! Thanks for having him on the show! 🙌🏻
My experience is that the more expensive lightweight high-performance racing tires seem to be more prone to punctures . They usually have thiner sidewalls and less rubber overall in their construction.
It is. Cheaper tires are always more puncture resistance, at the cost of rolling resistance, comfort (higher TPI) and weight.
They last less too the more expensive they are .
Of course, but it isn't a 1 to 1 correspondence. The Continental 5000S variants for instance are very fast and pretty durable. As you go to tires much faster than that, you need to consider the course, and replace them sooner.
This is a must podcast ! Can’t wait for the rest of this conversation.
Definitely think you doing a podcast is the way forward !!
Josh is amazing and definitely knows all the details and has all the experience working with cycling teams and testing products. I buy Silca products because of his insight.
I've been buying Silca products LONG LONG before Josh took over (I have an orange Silca Pista floor pump, and an ancient Silca Impero frame pump from over 52 YEARS AGO, when I first started racing on tubulars, both still fully functional!!).
But yeah, this man most definitely knows his subject matter, and then some!
(He might even be able to change my old school, died in the wool
This style of video is a nice change of pace from the regular "what do the studies say" videos. I like both styles.
Awesome video! Dylan you lead the way with science based cycling content! Really an eye opener when it comes to tires and pressure.
Explanations were very understandable and made sense. This content and others that you have shown have helped shift my perspective. That's been very helpful and have provided for a more enjoyable experience on and off the road. Thanks.
I like the discussion. Remember years ago, seeing a set of roll down tests of different tires and pressures, and a 'quick and dirty' correlation between how easy it was to deflect the UNINFLATED tire on say the sales rack and the rolling resistance; the easier to deflect, the easier to roll. Goes along with the hysteresis losses examined in the vid. Not foolproof and lots of qualifications but workable.
Dylan, Really good video. Your training videos are the best but introducing other topics/styles such as this is really interesting. Great to learn from experts.
Damn, that was just straight up excellent. So robustly and concretely communicated.
Excellent video and technical info. Indeed a different approach to the common questions many of us have. Thanks Dylan for your incredible helpful series of videos and bringing more science to this sport. Kudos !!!!!!
So glad you asked about inserts. Was thinking just that when he was explaining hysteresis 👍🏼 super interesting info, thanks for sharing!
Hi Dylan your my go to guy for everything cycling racing related, your very specific in you videos and all the stuff is 100% related to my cycling,, keep it up, don’t change a thing, your by far the most informative
Really enjoyed this. So many interviewers love to jump in and take the show. But this was an interesting dude and you kept the convo moving forward. Loved it.
Excellent! Your guest was very knowledgable and articulate
Super interesting discussion. I felt like we could have kept going with the topic. I think it’s nice you’ve brought in industry experts and pioneers to discuss a subject. Would love to see more. Maybe you have podcasts in your future?
Absolutely outstanding video; your contributor Josh was excellent and informative - the perfect mix of technology, application and real-world knowledge.
Yes,more like this please Dylan.
Yes, please do more in this style! And definitely let us hear the immediate follow-on from this one. I'm on Tubolight in two different wheelsets per your recommendation and I'm convinced they (insterts in general rather than tubolight specifically) are the most underrated tech in gravel/cx at the moment. It was really fascinating to hear more of the science behind how and why they work and what sets different types apart from one another!
Good Stuff, I just bought one of these Vittoria inserts to try on the gravel setup here soon. So glad to hear he gave some real world info on it.
Yes please release more of this conversation. The insight offered is great and I lost track of time listening to it.
This was awesome. I really learned a lot of things from this discussion that I don't really hear anywhere else. Thanks for sharing. And I'm definitely going to check out that podcast.
Great format. Great content. Always nice to vary things up and let someone else say the same thing you would say, but in their own way. Thanks!
Great video. Great guest and information. Format is good and only adds to the content you provide!
Very interesting! As a downhill/enduro bro, I actively look for a tyre with high hysterisis to keep grip on trails. Michelin tyres are a great example; very low durometer, very slow rebound. Those characteristics keep the tyre from feeling bouncy or "pingy" when riding through fast, chunky sections.
Great Video. I enjoy that you vary the style of your videos. The scientific-paper ones are nice, but interviews and alternative approaches to topics really spice up your channel. I like it. Also: Great topic here
This was the excellent, please keep providing this type of content. Thanks!
Needs an interviewer who knows what he's talking about. Let Backwards Hat Dylan take the next one.
Seriously though, great video!
I'm really happy that I found your channel ! The content is super interesting !
I definitely would love to see more of this kind of videos!
Interesting format. I‘d love to see more, especially on the MTB side. I plan to race XCM again this years after a long break and on a 5 or more hour race a few watts saved make a difference.
This was amazing. Very much appreciated an additional expert to cover such a topic.
Amazing content ! Please bring more guests to widen the view on cycling. Nailed !
Great interview. Can't wait to see more. I'd be interested in knowing the difference in tire thread patterns on different surfaces like gravel . Can't find that data anywhere so I plan on doing tests like you did.
That was GREAT ...I want to hear the rest of that interview. Please share the balance ! it's really good information and very understandable, also matches some real life experiences and answers many questions !
Thanks Dylan for sharing. Quite fascinating. We were debating this issue recently in our cycling club. I shared your video with our members. We may all be faster next weekend LOL
Glad you asked insert question. I’ve been curious
Excellent video Dylan! Thx for the insights!
Dylan - loved this- seems like you've been a proponent of tough tires and flat protection in the past. It'll be interesting to see where this leads. I love big tires and low pressures .
Great content. Great guest. Love the MG podcast. Please consider a conversation with Jan Heine, Rene Herse. If I recall correctly, Josh has hinted on the MG podcast that he may disagree with some of Jan's findings/testing/data on wider tires not being slower. If you could get a full length panel discussion with both of those guys - THAT would be gold. Keep up the good work, Dylan.
I definitely agree. It's hard to have a conversation about low tire pressure and rolling resistance without mentioning the huge contribution of Jan Heine!
Great video. As someone obsessed with gravel tires, this was very insightful.
Loved hearing Josh talk tires!
Well done Dylan! Super episode!
This was fantastic. More please.
Awesome video with a lot of good info, looking forward to more
Nailed it! Have been trying to work out a balance between the most efficient tire and insert setup for the upcoming gravel season while also being as puncture resistant as possible. This was very useful information, thanks! Discussion with an industry expert format was great!
From my mtb experience I find the inserts (I use tannus with a tube as I am too lazy/cheap/eco to keep topping up tubeless sealant every few months) it is easy to opt for too low a pressure. The inserts do a great job at cushioning the rim and propping up the sidewall allowing decent cornering but one sharp edged rock will STILL always get me a pinch puncture. I either need more robust tubes or put a bit more air in - still playing around but the take homewould be don't expect full protection from the insert. Grip, comfort and protection from small thorns etc - brilliant but pinch protection not great.
@@thebrowns5337lol tannus tube inserts are the slowest thing you can run
awesome video with a lot of insights, keep them coming!
This was great. I listened to the entire session. Please share the rest of it.
Thank you for enlightening me on these technical aspects!
Your videos are always informative. Thanks for posting.
Killer video. The stuff on inserts was awesome. I hope a future video delves further into the specifics of gravel inserts!
Thanks Dylan I am one of those guys that ran as much pressure in my tire as I good back in the day. (1980) Know that I am a bit older (68) I can use every bit of help I can get. LOL I've been running lower pressure for years and it helps make the ride more enjoyable and at the same time faster. Good tires at the right air pressure, the best chain you can afford, best chain rings and cassette, then bearings and a frame that allows the peddle stroke to move the bike forward with no energy loss. With that in place we have NO Exceuses. Ride hard and with passion. Rick
I hear ya, I’m 68 also, raced bikes in 76, and mountain bikes in the 90’s. I always used 110 in my sew ups for races on the road. Now I use 100 lbs. in the rear, and 90 lbs in the front (700x25 clinchers) for rides. My mountain bike I use tubeless tires at 35 to 40 lbs. hard tail with 110mm Fox front shock. I still love to ride regularly.
Super, more of these, please!
Definitely enjoyed this style of video and came away with some good takeaways.
Excellent - this new format is thumbs up!
Great video. What s sharp guy. Thank you for the high quality content. The insert discussion was especially informative.
Very captivating topic, explained in a way that can be easily understood. I really enjoyed it, thanks!
Thank you for this video. The knowledge about the tires really helped me.
That was very interesting Dylan excellent job.
Great content! Love the nitty-gritty details and conversation with an expert
Engineer here, the reason low pressure is faster is down to idea gasses being perfectly elastic, meaning that compressing air is much more efficient than compressing your tire will ever be, making the tire lower pressure puts a lot more of the burden of deforming on the air rather than the tire. That's the real reason it's faster to run lower pressure
Soooo good. Thanks Dylan!
Fantastic info - thanks for this video!
Absolutely fantastic content!!
I'm so glad you asked about the inserts. (I was not surprised you did though!) I don't think I've ever heard authoritative, objective information on them before.
So you are confirming something I've been observing for a while but never really checked deeply.
I've been thinking about this loss of energy when going with high pressure on road with loose gravels
this is so cool and I love how technical it is
After looking into the TIRE PRESSURE CALCULATOR and seeing how low the suggested tire pressure should be, I'm very enthusiastic to try it out! It's pretty sweet tool. Thank you for the insight!
u will regret it when u hit a pothole at high speed. Bye bye to ur carbon rim.
@@ighfirlee If I were to worry about damaging my bike, I would ride slow, flat, boring tail trails... However, I can't worry about that! I would rather have the traction to make the turn and grip to dirt accordingly! Plus, my ENVE carbon rims have a lifetime warranty :) Ride On!
Great vid. Look forward to the rest of that conversation!
Awesome video! Great to hear an expert talking tech
Great video! It was really interesting, would like to see more of this type.
You make the best stuff ... thanks and keep it coming!
so insightful, really interesting how you approch theory vs pratice. great content
Great Video…!! Lots of really good info.. I’m so glad you got into the tire insert stuff..! 👍🏼
This was fantastic! I also have the Vittoria inserts for 28 tires and this was good to know.
Your video helped me to understand the 'why' behind the what better than others have. I knew that a 'more supple' sidewall helped reduce resistance. Now I have a better sense for why. That's cool and thank you.
This was super interesting, love a few more like this
Great interview and knowledge... thanks Dylan
Loved the info and helpful links
Great questions Dylan and great information. Thanks
Great content and info. Really good to know I’ve been heading in the right (lower) pressure direction, especially on my crappy Tucson roads…impedance is stupid here!
Great video. Comprehensive and well presented.
This was awesome, he was talking to us and not "at" us, very clear and super interesting
Great video. Thank you. Helped me a lot.
Yes Dylan, more of this kind if info would be great, good one Bro.
great job! I'm about to test the Vittoria next time I replace my tires. Thanks Dylan and Josh!
Unreal stuff. Way too much info that I have been looking at, from the silica wax vs one I'm using, to the vittoria foam inserts added resistance. That man is a wealth of info.
Very good! ! Haven't been here for a while. Enjoyed this one.
That was incredibly helpful! Thank you so much for this.
Fascinating would love to hear more about tire inserts.
Excellent, having two people talking makes it more entertaining. Very informative!
Great content, Dylan. Thanks 👍
great video, looking forward to more