Rox Speed FX 1 1/8in. Anti-Vibration Handlebar Riser - 2 1/4in. Rise - 1 1/8in. Stem Clamp 3R-AV2PP Anti-Vibe Risers may interfere with aftermarket large capacity fuel tanks, and some steering stem clamp configurations (use standard pivoting risers). These risers use 8mm clamping bolts. Always check and confirm that your bike has adequate cable and brake line length before installing any handlebar risers.