Originally Posted by upsrogue
I put the tensioner on at first, it did'nt fit the frame right so I could never get it clamped down tight enough for it to do the job to begin with. Then when it received some real tension fom the chain it bent in toward the spokes and bent the rim
IMO the tensioner is more trouble than it's worth and a safety hazzard. Specially if your bike has regular droputs so you can move the wheel back-and forth. Between that and half-links there's no reason to get involved with engine shims either.