Originally conceived in Moto2 but now adopted by almost every motorcycle body worldwide (ACU, MSVR, FIM, AMA) and required for racing, the 'Lever Guard' was developed to help avoid the accidental engagement of the front brake lever during close wheel to wheel racing (either from accidental contact with another bike or even a rider) but can equally be applied to road riding, protecting your lever(s) from wing mirror strikes while filtering; again potentially causing front brake engagement. Fits: BMW S1000RR 2019-2021