alpha Racing Install Kit for WSBK Chain Adjuster BMW S1000 RR/HP4 (2010-, 2015-), to fit OZ wheels IDM spec or AR wheel, consists of distance bushing right/left and modified brake disc carrier, fits OEM swing arm. Special Notes: Additional parts needed: This kit is required to fit the alpha Racing chain adjuster. alpha Racing utilizes state-of-the-art computer automated design and experience in World Superbike Championship and brings you the very best in BMW S1000RR/HP4 billet parts. These special parts are high speed CNC machined, completely milled from high-strength aerospace grade billet aluminium and hard anodized for superior finish, ultra-lightweight and extreme durability. Benefit from the unrivaled racing knowledge of alpha Racing in Germany and their professional experience in World Superbike, World Superstock, German IDM Superbike Championship, FIM Superstock Cup 1000, MotoGP and 24 Hour Endurance Racing by using genuine alpha Racing Performance Parts, Electronics and ECU Flash Tuning. - brake disc carrier +10mm - distance bushing right - distance bushing left