How Tire Rolling Resistance Affects Cycling Speed ?

Рет қаралды 12,215

Global Triathlon Network

Күн бұрын

Пікірлер: 23

@FliskerX 25 күн бұрын

Great video, all information, no fluff! 10/10

@marcuswills6569 7 ай бұрын

That was a well informed, well put together VT 👍

@MrYorrik 7 ай бұрын

Brilliant summary, thanks. Tyres really are the absolute best value-for-money way to change the feel or performance of a bike.

@sebastienhuot9728 7 ай бұрын

I liked the animated parts in this video. Well done!

@MarvinNeumannOfficial 7 ай бұрын

Thanks for all the explanations 😊

@melibaut 7 ай бұрын

Interesting and informative video. Thank you!

@JackMott 7 ай бұрын

The mass of wheels has very minimal impact on acceleration, you can work out the math relatively easily, I've got a spreadsheet for it. The differences in wheel mass are small and the acceleration rates of cyclists is low, when you do the math wheel weight is barely any different than weight anywhere else, and only in extreme scenarios like a 1,000 watt surge from low speed.

@earthenscience 2 ай бұрын

Can you explain this to me? Cause people keep saying that airflow is most important and drivetrain efficiency is unimportant. But when I have my bicycle upside-down, it takes quite a force to rotate the pedals, so I think wheel weight and drive-train efficiency may be important

@JackMott 2 ай бұрын

@@earthenscience Drivetrain efficiency can be pretty important, a dirty or badly lubed chain, or worn out bearing will be very bad. But you don't need any fancy parts. Regular bearings and chains in good condition are 99% as good as the fancy stuff. Regarding wheel weight, when you turn the wheels in isolation, the only thing you are accelerating is the wheel, so in that scenario a lighter wheel will feel noticeably easier to get going. 10% lighter, approximately 10% easier to spin it up. However when accelerating the whole system of your bike (and you!), that same ~100 grams of extra wheel weight is only 0.1% of your total system mass you are accelerating. Accounting for rotational inertia only doubles that penalty in the worst case (0.2% if all the extra wheel mass was on the outer edge of the tire which it can't be of course).

@larrylem3582 7 ай бұрын

Tubeless tires are clincher tires. When did we start saying that they're not? On tire pressure, it would have been good to note that going too low increases rolling resistance. One should aim for the "right" pressure.

@Yurkevich22 7 ай бұрын

all tubeless are clinchers, but not all clinchers are tubeless. I guess it's just simpler to differentiate like that - tubeless means no tube inside and clincher means a tube inside. Kind of the same deal with clipless pedals that you actually clip in to.

@goingtothefifty 7 ай бұрын

Im 200 lbs there is no bouncing anything on a regular road even with maximum pressure. If you are bouncing around so much that your get airborne, you will not have complete control of the bike and will most likely crash

@marcuswills6569 7 ай бұрын

Its unlikely that you would actually feel like the bike is bouncing it happens so quickly, but is considerably slower.

@goingtothefifty 7 ай бұрын

@@marcuswills6569 if you really look at it, its the material that makes rolling resistance low. What if, they make 35mm tires material have less rolling resistance than 25mm, to grease up production and profit.... my money is on greed.

@goingtothefifty 7 ай бұрын

@@marcuswills6569 its the material that makes for lower rolling resistance. Its physically impossible for a larger tire with lower pressure to have less contact point than skinnier tire with higher pressure (as Area = Force / Pressure) otherwise F1 racing cars would have 25mm tires...LOL. My bet is that all about profit and greed

@fernosan 6 ай бұрын

@@goingtothefiftyapparently a wide but smaller (from front and back) contact point is better than a narrower and longer one. For me, this is counterintuitive considering cars. Narrower tires makes for more fuel economy in cars, so I'm left scratching my head over the idea if wider is better. The bouncing effect is just a fancy name for tire skid, and I agree that this seems far fetched. I don't see my rock hard tire skipping.

@goingtothefifty 6 ай бұрын

@@fernosan I dont think that its counterintuitive because if you let air pressure off the tire gets more contact and its gets harder to pedal, and that is testable by yourself. However a 25mm gatorskin vs 25mm grand prix, you can tell the difference.