The BR-M8020 disc brake by Shimano - four pistons for XT
Shimano has developed the XT BR-M8020 4-piston disc brake to help trail riders and E-MTB bikers get more braking power. It has 20% more braking power than the BR-M8000 2-piston brake. The caliper comes in combination with the proven, I-Spec II compatible XT BL-M8000 Servo Wave brake lever, so that for aggressive trail riding or applications in the E-MTB sector more tuning options are now conceivable. Of course, BR-M8020 is also equipped with Ice-Tech and One Way Bleeding technology.
Guidelines for Replacing E-bike Components:
Before you replace components on your E-bike, please read through the guidelines for component replacement for CE-marked E-bikes/pedelecs with pedal assistance.
Series: Deore XT M8000
Application: Trail, All Mountain, Enduro, E-Bike
Type: hydraulic, 4 pistons
Actuation: mineral oil
Line Length (Front/Rear): 1000 mm/1700 mm
Technical Information - Calliper:
Calliper Mount: post mount
Pads: H01A metal with cooling fins (H03A resin, D01S / D03S resin H03C metal optional)
Calliper Material: aluminium
Hose Connection: banjo
Technical Information - Lever:
Lever Length: 2-finger
Adjustment Options: reach adjust (no tools required), free stroke
Installation: clamp (split), I-Spec II
Design: right (side-specific), left (side-specific)
Brake Lever Material: aluminium
Brake Lever Housing Material: aluminium
Hose Connection: straight
- 20 % more brake power than BR-M8000
- especially for aggressive Trail and E-MTB riding
- IS mount with adapter possible
- 4 ceramic pistons
- recommended brake rotor: RT-MT800, SM-RT86, SM-RT99, RT-EM810, RT-EM910
- painted brake calliper, steel bolts (5 mm)
- more stable braking performance under different conditions without changing the lever position
- slim, durable and tidy design of the main cylinder with I-Spec II
- anodised lever, painted body, stainless steel clamp bolt
The Servo Wave brake lever takes up a lot of braking distance at the beginning of its movement so that the pads can be guided to the brake rotor with short lever travel. After the brake pads have been applied, the power transmission factor increases rapidly. The greater part of the lever travel is thus still available to increase the braking force and to modulated it more precisely.
The XT M8000 levers are compatible with the I-Spec II system, which allows the shift and brake levers to be mounted on the handlebars with just one clamp, giving more freedom in cockpit design, saving weight and improving ergonomics through a wide range of adjustment options. Simple assembly with narrow brake lever clamp. More space on the handlebars and a tidy look. Maximum vertical adjustment range: 15°, maximum horizontal adjustment range: 12 mm. I-Spec II brakes are not compatible with I-Spec, I-Spec B and I-Spec EV shifters (and vice versa).
One-Way Bleeding is designed to quickly and easily prevent air from entering the hydraulic system. Shimano has optimised the brake fluid flow path throughout the system to prevent air bubbles from being trapped in the system.
One way oil routing plus a funnel tool with mineral oil provides an easy and clean bleeding system.
Fading of the brake during prolonged uninterrupted operation, e.g. downhill, impairs braking performance. Shimano has introduced brake rotors and pads with Ice-Tech technology to create a cooling technology for consistently high braking performance. The brake rotor has a three-layer stainless steel sandwich structure on the outside encasing an aluminium core. It radiates heat better and reduces surface temperature from 400° C to 300° C, for example. The brake pads also have optional cooling fins. The design of the rotor in combination with the cooling fins results in a longer service life of the pads, less braking noise, less fading and lower weight.
XTR, Saint-, XT, SLX and ZEE callipers are combined with oversized ceramic pistons to achieve light weight, high rigidity and optimised heat dissipation. Oversized pistons transfer the hydraulic power directly to the brake pad. A ceramic material is used to avoid heat transfer and ensure constant, safe braking performance. This provides efficient brake force transmission without losses.
Manufacturer Part Numbers:
- 1 x Shimano XT BR-M8020 + BL-M8000 disc brake, front or rear
- 1 x Shimano SM-BH90-SBLS brake hose, 1000 mm (front) or 1700 mm (rear)
- 1 pair of Shimano H01A brake pads
- 1 x inserts
- 1 x olives
- 2 x calliper bolts
- 1 x snap ring
- not incl. brake rotor
- not incl. adapter
- ready to mount (filled & bled)
- TL-BH61 tool for insert installation
- Bleed Block Y-8FF19000