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Trek Bontrager Rhythm Comp KnockBlock Stem – No Packaging

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A reliable 31.8 mm aluminium MTB stem available in multiple lengths to fit your bike.
- Get 31.8 mm handlebar compatibility with your Knock Block system
- Also compatible with standard headsets and spacers
- The Knock Block system protects the frame from impacts by fork and handlebars by eliminating over-rotation of bars
- Available in a wide range of sizes for today's mountain rider
- See Service Parts for other Knock Block parts

Please note: Manufacturers can sometimes change the specification of the products from time to time.

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