Tech EVO TR4 Disc Brake

Trail-proven power with balanced modulation. The one-piece TR4 caliper with larger pistons and shared GR4 pads delivers a 6.5% increase in braking ratio over the previous E4 system—ideal for trail and all-mountain use.

EVO Master Cylinder: The Master cylinder features a new cam mechanism to reduce free stroke while maintaining the feel and modulation, a key feature of the much-loved Tech 4. The piston assembly—features a secondary guide bush and sliding guide—ensures ultra-smooth operation throughout the full lever stroke.

EVO Calipers: The caliper bodies have been refined for greater stiffness, improved hub/frame compatibility, and streamlined profiles. Bore cap designs are optimised to reduce width and improve fit across modern frame geometries.

Key Updates

• Optional Control and Power Lever Blades, shaped for riders who prefer their brakes to bite at the extremes of the lever adjustments
• Control: For riders who run their bite point close to the bars
• Power: Bite point further out
• Redesigned lever with more pronounced hook and dimples for more confidence in wet or cold conditions
• New cam design and piston provide a firmer bite point and more feel
• Upgrades to the lever bearing and piston add to the T4's already incredible feel and consistency
• Clean, simplified bleeding thanks to a new bleed port in the master cylinder
• Caliper tweaks enhance the consistency of performance as the pads wear
• Larger pistons than E4 increases the braking ratio by 6.5%
• Larger pads than E4 improves lever feel and consistency
• Improved caliper stiffness
• Lower profile shape with new bore cap design for more clearance