Disk wheel balancing?
Posted: Fri Feb 06, 2015 10:26 am
Hi all,
New to disk wheels, and currently setting up my time trial bike. The disk wheel seems horribly out of balance, and spinning it up to any reasonable speed makes the bike violently shake up and down on the work stand.
The culprit seems to be the cutout around the valve which I estimate removes around 15 cubic centimeters of structural foam and of course has no disk wall on one side. The weight difference is enough to make the wheel quickly freewheel to a position where the valve is uppermost when the bike is suspended.
If this was a car wheel I'd get it balanced which would mean adding lead weights to the rim, but that seems like madness when everything else on the machine is kept as light as possible. Is this an issue most people ignore, or is it a problem specific to my wheel (which came with the second-hand bike)?
Cheers.
New to disk wheels, and currently setting up my time trial bike. The disk wheel seems horribly out of balance, and spinning it up to any reasonable speed makes the bike violently shake up and down on the work stand.
The culprit seems to be the cutout around the valve which I estimate removes around 15 cubic centimeters of structural foam and of course has no disk wall on one side. The weight difference is enough to make the wheel quickly freewheel to a position where the valve is uppermost when the bike is suspended.
If this was a car wheel I'd get it balanced which would mean adding lead weights to the rim, but that seems like madness when everything else on the machine is kept as light as possible. Is this an issue most people ignore, or is it a problem specific to my wheel (which came with the second-hand bike)?
Cheers.