Recommended for V1 spline-compatible cranksets only. Not compatible with V2 or ISIS splined systems. Compatible with splined V1 Shimano Dura Acereg Ultegrareg 105reg and XTRreg 22mm 8-splined hollow systems. Large diameter pipe billet spindle. Sealed Cartridge bearings. Splined spindle ends for increased joint strength. Double 109.5mm spindle or Triple 118mm Spindle. English 68mm Shell or Italian 70mm shell threading. 250 grams 109mm spindle.