Kines
09-30-2006, 08:31 AM
Rear freewheel/hub rolling resistance: How much does it add to the total rolling resistance?
Specifically, I had a rear wheel rebuilt by the manufacturer. As soon as I picked it up and turned the freehub with my fingers it was markedly different than before (from angry bee to now near-silent). And when I put the bike on the workstand and spin the rear wheel, it comes to a stop much sooner. By contrast, I have an older campy record/Mavic open pro that you can spin in the workstand, go out for lunch, and when you come back it's just coming to a stop.
Don't worry - I'm not stressing over whether this will add 45 seconds to my next lame century time; I'm just curious.
Oh, and also: does the contribution to drag from this situation occur only when coasting? I think it must.
Specifically, I had a rear wheel rebuilt by the manufacturer. As soon as I picked it up and turned the freehub with my fingers it was markedly different than before (from angry bee to now near-silent). And when I put the bike on the workstand and spin the rear wheel, it comes to a stop much sooner. By contrast, I have an older campy record/Mavic open pro that you can spin in the workstand, go out for lunch, and when you come back it's just coming to a stop.
Don't worry - I'm not stressing over whether this will add 45 seconds to my next lame century time; I'm just curious.
Oh, and also: does the contribution to drag from this situation occur only when coasting? I think it must.