"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. Key Features • 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 Black, Silver, Smoke, Blue, Red, Purple or Orange accents."
