"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."