Details

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.

TR4 Disc Brake

Four-piston trail brake for medium-duty use.

The ultimate trail-riding brake - impressive power balanced with a firm and consistent lever feel. Super-smooth lever actuation provides excellent braking feedback for absolute control.

Master Cylinder Lever

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 ultrasmooth operation throughout the full lever stroke. 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.

Technology

The Lever Blade

Brakes are supplied with standard (STD) lever blades, this blade will be the right choice for the majority of users and applications. Power and Control options are available separately.

All EVO blades feature an increased lever hook for greater control and security during aggressive riding and a new dimple design in the finger contact area to improve comfort during hard braking, while still retaining grip in all weather conditions.

All blades also allow reach and bite point adjustments. There are 3 different lever blade options:

Standard

A good balance of lever feel, power and adjustment range.

Power

A profile tailored for users that position the lever further away from the bars, allows for 5mm more outward adjustment than STD. Increased length generates more mechanical leverage and compensates for lever position further away from pivot point.

Control

Optimised for running closer to the handlebars, allows the blade to be adjusted 5mm further inwards than STD. Slightly shorter length helps to maintain lever feel with the change in biomechanics.

Cam Mechanism

A new cam designed to decrease the free lever stroke while maintaining the feel and modulation in the braking zone - a key feature of the Tech 4 brakes.

The result is a slightly firmer feel at the bite point, followed by a gentle rise in power through the braking zone, further enhancing brake modulation.

Piston Movement

Roller bearing main pivot is carried over from Tech 4 along with sliding guide bush on the main piston.

Additional secondary guide bush keeps the piston running perfectly straight to maintain super smooth piston movement throughout the full lever travel.

Bleeding

A bleed port has been added to the master cylinder body to allow bleeding without removing the lid, simplifying and streamlining the process. The classic "open" bleed option is retained for the ultimate bleed.

The internal port design has been reworked to eliminate air pockets during bleeding and to support a more consistent bleed process.

Features

3 Lever Blade Options: Standard, Control & Power (Control and Power are not included)
Ergonomics: Redesigned lever with increased hook and new dimple texture for maximum grip and control in all conditions
Improved Modulation: New cam design and piston improvements deliver firmer bite point and improved feel throughout the braking zone
Smooth & Predictable Lever Feel: Upgraded internal piston mechanics and roller-bearing pivots ensure consistent performance and feel
Simplified Bleeding & Maintenance: A new master cylinder bleed port allows clean, tool-efficient bleeding without lid removal
Improved Pad Wear Consistency: Caliper tweaks to improve brake feel across the entire pad lifespan
One piece machined caliper for reduced weight and increased stiffness
Four hybrid pistons allow smooth movement and excellent heat management
Larger pistons for increased power
The larger pistons increase the ratio of the brake by = 6.5% when compared to Tech 4 E4 brake system
Revised bore cap design reduces width for more frame clearance
Larger pad improves lever feel and consistency
Choose this caliper for power balanced with a firm lever feel and excellent braking control