Pigmy axle & OKR bolts19/20mm machined 48T spline Cr-Mo axle for secure power transfer20mm over the centre section tapering to 19mm spline areaAvailable in 3 lengths to offer optimised chainline for rear hub spacing;145mm BMX153mm MTB (for use with 68/73mm bb shells)165mm MTB (for use with shell wider than 73mm)Compatible with Pigmy and Pigmy R-series arms.Axle is supplied with Pigmy OKR bolts and caps.Weights (inc bolts)145mm 320grams153mm 332grams165mm 410grams