Tusk Handlebar Risers 7/8" Bars, 30mm Height - Fits: Honda CRF230M 2009 Tusk handlebar risers increase handlebar height by either 15mm (0.6") or 30mm (1.2"). Spacers are made from billet 6061 T-6 aluminum. Tusk handlebar risers are complete with strong 12.9 tensile strength chromoly steel bolts. Handlebar risers are available for both standard 7/8" bars and oversized 1 1/8" bars.