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The simple way to turn a geared frame into a singlespeed. Full Description
From £14.99



On-One Doofer Singlespeed Chain Tensioner
In stock £14.99

Got a geared bike that you want to run as a singlespeed? Decided your commuting bike needs the fuss-free reliability of hub gears? The On-One Doofer chain tensioner takes up the slack with a simple sprung arm and jockey wheel.

Screws into the gear hanger. Adjustable side-to-side for chain position.

Additional Information

Product Code:FSOOSSD

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