Originally Posted by
Wattsup
Ok, so let's eliminate the variables. How much slower (if at all) would one tire be than the other....on asphalt?
Really hard to say,
https://www.bicyclerollingresistance...on-32-37-40-47
This suggests that pressures being the same the wider tire always has less rolling resistance to a point, resistance goes up for the 47 but still not as much as the 32 yet the weight difference between the 32 and the 47 is 3/4 of a pound, or 1.5lbs on a pair. So a 37 or 40 might be better as they're fairly wide for comfort, better rolling and not a weight extreme. I wouldn't mind 1.5lb extra rolling across Nebraska from west to east with a tail wind or riding all gravel and jeep trails in the Adirondacks. I wouldn't want it while riding through the hills of the fingerlakes which have decent roads and no flat areas longer then .5mi.