Wunderlich - Balance Adapter For Rear Wheel for BMW R 1200 GS (2008 - 2009)The hub of the rear wheel rim has a diameter for which there are no standard axle attachment points for balancing. Now there is! Our balance adapter sits snugly inside the wheel hub, centres it and screws onto the flange of the rim at five points. This means the 25 mm axles of all standard balancers or balancing stands can accommodate the rear wheel safely and without clearance. We include a matching axle ( 25 mm, length 420 mm) with our balance