On a Scientific Triathlon podcast I listened to the other day it suggested putting different tyre pressures in front/rear depending on weight distribution. On a road bike the distribution is typically 60%-40%, with more weight on the rear wheel. So 60% of the total tire pressure should be in the…

Does this take into account when out of the saddle? Do you know how the weight distributes when stood up?

I’ve not had chance to look at my weight distribution in any detail yet. I assume you’re best setting the tyre pressures based on the weight distribution of the position you’ll be spending most of your time in.

For the last year or so I’ve been doing that after reading about pressure distribution. I was running around 95-100 PSI on the TT bike but last season I started using around 90-95 in the front and 95-100 PSI in the rear. 20mm Conti Supersonics FWIW. Along with the information on the Silca website r…

Thanks for the link @JulianM , nice article. The graphic showing Crr versus tyre pressure is real interesting. [image] Riding at 110 psi instead of 100 psi could actually lose 6 watts :open_mouth: Based on the state of most of the roads I ride on it looks like around 95 psi should be the highest pr…

The whole series is well worth a read if you are that way inclined! It certainly seems that it’s better to err on the lower side because the penalty if you’re just the other side of the break point can be significant. The balance of rolling resistance, tyre pressure and the aero dynamic relationshi…

[image] JulianM: I was running around 95-100 PSI on the TT bike but last season I started using around 90-95 in the front and 95-100 PSI in the rear. Have you measured your weight distribution on the TT bike, or just an estimate? That article suggests 50/50 for a TT bike: A TT bike also ha…

No, just an estimate on my part. For the reasons you say about weight distribution on TT bikes I just try to put a little more in the rear than the front rather than look for a significant difference.

I believe FLO had the first info on this that I saw (not saying they were the first, but what I came across first) and I’ve been running about the same 5PSI difference between from and rear and pressures on my Tri/TT as @JulianM as well. Whether it makes a difference… :man_shrugging::joy:

Using different tyre pressure in front/rear

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steveh67 November 11, 2018, 10:59pm 10

Cyclocross riders typically use 1 psi lower in the front tire than in the rear. At 24 or 25 psi, that 1 psi is roughly a 4% difference.

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Using different tyre pressure in front/rear

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