Racingline Brake Kit 5mm Hub Adapter SetClearance over big brake kits is always a challenge, especially with factory wheels. All of RacingLines brake kits feature our unique design that allows these 5mm Hub Adaptors to be solidly, mechanically mounted onto the front face of the disc to give you that extra clearance. No more adding loose spacers onto your car. Fitting and removal of the Hub Adaptor is a simple, reversible upgrade that takes minutes to do. If you ever plan to change wheels in