EROCA M4 Mountain Bike Hydraulic Disc Brakes Four Piston Oil Brakes Two-way Brake System Mountain Bike Cycling Brake Lev
The life of the rotor can be extended with the help of the two way brake. For the left brake lever. 22 2mm handlebar Hydraulic. 4 piston. The four-piston and two-way brake prolong the life of the rotor. It's appropriate for most mountain bikes.