Shimano Deore XT Disc Brake BL-T8100 + BR-M8120

The 3-finger lever for the SHIMANO DEORE XT T8100 hydraulic disc brake is longer and compatible with I-SPEC II mounting. Compatible with a 4-piston caliper, the BL-T8100 lever offers greater braking power and intuitive modulation for E-Trekking bikes. The SHIMANO DEORE XT M8120 brake caliper delivers consistent and reliable braking performance in all conditions. The 4-piston disc brake caliper offers great control and inspires confidence on descents.

Lever Features

• Better ergonomics & easier control.
• Compatible with 4-piston caliper for increased braking power, especially for E-TREKKING bikes.
• Lever size: 3 fingers.
• Actual weight: 121 g.

Caliper Features

• Pistons: 4.
• Faster piston retraction.
• High braking power offers greater safety and control on descents.
• Reduces disc brake rotor squeal and increases braking power by 10%.
• Fitting: banjo.
• Fixing bolt: 5 mm.
• Brake fluid: Shimano mineral oil.
• Pre-installed pads: ventilated organic N03A.
• Actual weight: 168 g.

Technologies

4-Piston

The disc brake system with a caliper featuring two opposing pistons of different diameters is characterized by pistons of different sizes at the front and rear. The system uses a power transfer mode where the brake rotor is pressed by the smaller piston at the rotor seat entrance and also by the larger, more powerful piston at the rear. This prevents jerky movement and significantly reduces noise. Additionally, the 4-piston caliper ensures a larger contact surface while keeping the size compact, and the efficient pad positioning is adjusted as needed to stabilize pressure. Combined use with the ServoWave lever provides an extraordinary 50% increase in braking power compared to the previous model.

Ice Technologies

Incorrect configuration of the disc brake rotor and pads during braking on a long descent, for example, negatively impacts brake performance. Shimano has adopted Ice Technologies rotors and pads to achieve a cooling technology that ensures consistent performance. The coated disc brake rotor blade, featuring a 3-layer sandwich structure of stainless steel, aluminum, and stainless steel, provides better heat dissipation (from 400˚C to 300˚C surface temperature). The cooling fin for the pad ensures less wear, less noise, less efficiency loss, and lighter weight.

I-Spec EV

I-Spec EV creates a clean and optimized cockpit that allows greater focus and comfort for a wide range of cyclists.

Advantages and Benefits

• The wider adjustment range allows cyclists of various styles, preferences, and body types to find the optimal lever and control position.
• Ergonomic design, quicker lever access, and smooth operation improve riding comfort and focus.

I-Spec EV increases brake lever stiffness by moving the clamp inward to create an additional contact point between the handlebar and the lever. This extra support greatly enhances bike control and brake response while maintaining space between the clamp and the support point for other accessories to be mounted on the handlebar.