Four-piston gravity brake for the most demanding applications.

Delivers maximum power with no compromise. Super-smooth lever action and premium construction make controlling that power feel natural. The benchmark brake for gravity and e-bike use.

// Increased lever hook for greater control and security during aggressive riding
// New dimple design improves comfort during hard braking and retains grip in all weather conditions
// New cam design decreases the free lever stroke while maintaining the feel and modulation in the braking zone
Roller bearing main pivot
// 2 guide bushes keep the piston running perfectly smooth and straight
// Bleed port added to the master cylinder body enables bleeding without removing the lid
// One-piece caliper design for the best stiffness to weight ratio
// Larger pistons increase ratio of the brake for more power
// Improved caliper stiffness helps to improve lever feel and increase power
// Larger adjustment range for better compatibility with third party hubs and frame combinations
// New bore cap design decreases overall width of the caliper for easier packaging and better frame compatibility
// GR4's are not compatible with Vented rotors.
// Available in Black or Silver with red, blue, purple, orange, smoke, silver or black accents.