I had read speculation that lower pressure is actually not slower off road so I still wanted to try this. I had read speculation that lower pressure is actually not slower off road so I still wanted to try this. This applies equally on hard gravel roads and soft forest tracks. Tom Anhalt put it best in a recent e-mail, "On rigid bikes the idea is to be able to run low enough pressures so that the tires can be the majority of the suspension for the given conditions.” Mountain Bike Tyre Rolling Resistance Testing Article Peter measured rolling resistance under varying conditions. I think it's safe to say that starting at 0 psi, as you add pressure rolling resistance decreases up to a point, after which it begins to increase. The results presented here assume that the tires are kept at 100 psi (6.9 bars). Rolling resistance, sometimes called rolling friction or rolling drag, is the force resisting the motion when a body (such as a ball, tire, or wheel) rolls on a surface.It is mainly caused by non-elastic effects; that is, not all the energy needed for deformation (or movement) of the wheel, roadbed, etc., is recovered when the pressure is removed. High pressure actually reduces rolling resistance, but increases the chance of a heavy impedance cost. Tire pressure, tire diameter, tire width, tire construction, tire tread and other factors all have an effect on rolling resistance. How tire pressure affects rolling resistance on real roads is difficult to establish. While rolling resistance decreased with almost every rise in tire pressure on both the smooth and the bumpy rollers, the decrease was generally less significant each time on the bumpy roller. Air pressure affect on rolling resistance test From what I found on line, it looks like this has been done a lot for road bikes, and more pressure is faster but with diminishing returns. Most laboratory-based tests of rolling resistance find lower resistance at higher pressures, but this doesn’t always transfer to riding on actual roads. The lower the inflation pressure, the lower the rolling resistance. Tom Anhalt put it best in a recent e-mail, "On rigid bikes the idea is to be able to run low enough pressures so that the tires can be the majority of the suspension for the given conditions.” The main reason for the loss of energy is the constant deformation of the tire.

Tire Width & Pressure. Where that point is depends on a number of factors, but it … The fastest rolling tire, the 300 TPI Strada 24mm and the widest tire, the 27mm Paris-Roubaix, had the biggest increase in rolling resistance (1.6 Watts) when dropping pressure from 112 psi … On a completely smooth surface the following applies: The higher the inflation pressure, the inferior the tire deformation and thus rolling resistance. Don't know how that relates to the MTB trail rolling problem though. 10 Best Fast Rolling MTB Tyres For The Trail. Rolling resistance is the energy that is lost when the tire is rolling. Air pressure affect on rolling resistance test From what I found on line, it looks like this has been done a lot for road bikes, and more pressure is faster but with diminishing returns. They are interesting, and show some useful results, but it is worth noting that they are only testing a smooth(ish) surface. Tire pressure, tire diameter, tire width, tire construction, tire tread and other factors all have an effect on rolling resistance. Three different tyres (Schwalbe’s Fast Fred, Racing Ralph and Albert Brothers) in three different widths and at four different pressure levels (1.5, 2.0, 3.0 and 4.0 bar – … On a completely smooth surface the following applies: The higher the inflation pressure, the inferior the tire deformation and thus rolling resistance. High pressure actually reduces rolling resistance, but increases the chance of a heavy impedance cost. It’s really hard to say which pick is the top fast rolling MTB tyre because everyone’s riding style is a little different and it’s all relative anyway – say, for example, you and I were on the same trail but you preferred the Minion SS …