Brand-X Preload BoltThis preload bolt is a direct replacement for the original one that came with your Shimano crankset. It comes equipped with a tough 6061 aluminium build to prevent any axle crushing or ovality, while its longer thread prevents pull out. Another highlight is its smaller flange diameter, which ensures that the arm clamps the axle and is not restricted by the cap. This is a stronger replacement than the genuine Shimano bolt which comes as standard in your crankset.Compatibility:Compatible with most Shimano Hollowtech II cranksets including Shimano Dura Ace, Ultegra, 105, XT, SLX and DEORE.XTR - M9XX Series / M9000 SeriesXT - M8XXX Series / M7XX SeriesSLX - M7XXX Series / M6XX SeriesDeore - M61XX Series, M6XX Series, M5XX SeriesSaint - M8XX SeriesZEE - M6XX SeriesEBike - M8000Features: Material: Aluminium Compatibility: Most Shimano Hollowtech II cranksets including Shimano Dura Ace, Ultegra, 105, XT, SLX and DEORE Longer thread to prevent pull out Strong construction to prevent any axle crushing or ovality Smaller flange diameter to ensure arm clamps axle and not restricted by the capManufacturer's Part Number: BXPLB-BLACKBuy Brand-X Components from Chain Reaction Cycles, the World's Largest Online Bike Store.