Bontrager Rhythm Comp KnockBlock Stem (70mm)
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A reliable 31.8 mm aluminium MTB stem available in multiple lengths to fit your bike.
31.8 mm of durable control
Run your favourite 31.8 mm clamping diameter handlebar on a bike with Knock Block with the Rhythm Comp 31.8. It adds Knock Block compatibility to a durable stem with multiple lengths to let you fine-tune the fit to your ride.
- 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
- Approved for carbon bars and steerer tubes