The Shimano Saint BR-M820 J-Kit delivers exceptional stopping power for gravity, downhill, and freeride riding. This complete rear brake kit pairs the formidable 4-piston BR-M820 caliper with the BL-M820-B lever in a pre-bled, ready-to-install package — purpose-built for riders who demand reliable, fade-resistant braking in the most demanding conditions.

Highlights

• 4-Piston ceramic caliper: Opposed ceramic pistons provide consistent, high-power braking with excellent heat resistance under sustained load.
• ICE TECHNOLOGIES heat management: Finned metal brake pads (H03C-MF) and extra-long banjo fitting actively shed heat from the caliper, reducing fade on long descents.
• Servo-Wave lever action: Progressive lever feel delivers a rapid initial pad-to-rotor contact, then transitions to power braking — maximising modulation and control.
• Tool-free lever adjustment: Reach and free-stroke can both be dialled in without tools, allowing precise setup for any hand size or riding style.
• I-Spec B compatible: Lever clamp integrates directly with Shimano I-Spec B shifters to reduce bar clutter and weight.
• One-Way Bleeding system: Streamlined mineral oil routing and an included funnel tool make bleeding fast, clean, and largely air-free.
• Pre-bled and ready: Arrives fully assembled and pre-bled with 1700mm SM-BH90-SBLS hose for rear wheel fitment — minimal setup time.

Saint M820 Series

The Saint groupset is Shimano's benchmark for gravity-specific components, engineered for the rigours of downhill racing and heavy-duty trail riding. The BR-M820 caliper features a high-rigidity body that resists flex under braking load, while the hinged lever clamp simplifies installation. The BL-M820-B lever uses a 2-finger ergonomic design with textured surface for secure grip even in wet conditions.

Compatibility & Fit

Mount type: Post Mount. Hydraulic fluid: Shimano mineral oil. Compatible rotors: SM-RT99 (IceTech) or SM-RT86 (IceTech), sold separately. Rotor sizes supported: 140mm, 160mm, 180mm, 203mm, and 220mm (using the appropriate post mount adaptor). Lever: BL-M820-B, I-Spec B clamp compatible. Hose: SM-BH90-SBLS, 1700mm (rear length). This kit is configured for the rear brake position with a left-hand lever (Australian standard: left lever = rear brake).