Bearing losses wrt rolling resistance.
Bearing losses wrt rolling resistance.
(OP)
I've seen that increasing tire/wheel diameter can reduce rolling resistance marginally and was wondering if this was hogwash or not. I was thinking it could be a possibility if bearing friction is higher than the rolling friction between the tire/road, so increasing the speed of the outside diameter compared to the speed of the bearings could reduce those losses, which (along with different tread, higher pressures, and different rubber compounds) may also be why bicycles generally have much lower rolling resistance... But that's just speculation.
TIA
TIA





RE: Bearing losses wrt rolling resistance.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Bearing losses wrt rolling resistance.
RE: Bearing losses wrt rolling resistance.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Bearing losses wrt rolling resistance.
If the width, load and pressure are the same, bigger diameter should have less tread and sidewall distortion, so it should have lower losses due to hysteresis, however it will have a higher polar moment.
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eng-tips, by professional engineers for professional engineers
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