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. Features Bontrager Rhythm Comp KnockBlock Stem 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 Specification Size 0 deg. x 50mm 0 deg. x 60mm 0 deg. x 70mm 0 deg. x 80mm Rise 0 deg. 0 deg. 0 deg. 0 deg. Length 50 mm 60mm 70 mm 80 mm Steerer outer diameter 28.6 mm (1-1/8") 28.6 mm (1-1/8") 28.6 mm (1-1/8") 28.6 mm (1-1/8") Clamp 31.8 mm 31.8 mm 31.8 mm 31.8 mm Type Knock block Knock block Knock block Knock block Accessory compatibility Not applicable Not applicable Not applicable Not applicable Material Aluminium Aluminium Aluminium Aluminium We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice. Weights are based off pre-production products at time of publication. Weights may vary in final production.
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