Old 01-21-17, 07:31 PM
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Bikes: motobecane outcast 29er singlespeed and nashbar singlespeed road bike

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Originally Posted by wschruba View Post
Is the sprocket itself wiggling, or the whole driver?

Put another way: do you have play (felt as knocking) at the rim if you grab the top of the tire and wiggle it side to side?

The sprocket's mounting lugs can wear out, but I imagine the sprocket teeth would be severely worn out by the time that happened. It is uncommon for there to be any issues with the sprocket's mount, it's usually play in the hub that needs to be adjusted out.

A coaster brake can absolutely be run with no play in the axle, by the way--just to jump ahead of the train that will (inevitably) come running through here saying it needs play.
The wheel is tight and has no side to side movement.

I think the sprocket is the only thing that has some play.

Also it was recently adjusted and tightened but is now loose somewhat again
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