Styrstam Bontrager Rhythm Comp Knock Block 0° 31.8 mm 70 mm svart

Get 31.8 mm handlebar compatibility with your Knock Block system. Also compatible with standard headsets and spacers. Knock Block system protects 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.