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Ossa 250 MAR Chain tensioner


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You can do with out if you like, and I can see why you would want to with the crappy original combined rear brake shaft & tensioner shaft.

I have fitted a seperate tensioner to the swinging arm and a guide wheel below the swinging arm pivot, which works better than the original, where tension ranges from too tight when the rear brake is being used, to too loose when the brake is not being used.

Have not had the chain come off since changing from the original set up ( which usually happened only at the most dangerous time - like when you were close to the top of a steep climb)

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