Shimano BR-MT420 + BL-M4100 Disc Brake J-Kit

Shimano BR-MT420 disc brake - with strong 4-piston caliper

The Shimano BR-MT420 disc brake gives you full braking power for Enduro use thanks to its 4-piston brake caliper. On the lever side, it is characterised by a 2-finger brake lever whose reach can be adjusted by a bolt. The brake lever is mounted to the handlebars with a split clamp, which also allows the combination with a matching I-Spec EV shifter. Funnel bleeding and One-Way Bleeding technology, which prevents air bubbles from remaining in the caliper, make maintenance easier. As a J-Kit, this brake is delivered in such a way that you can easily mount it, even if the brake hose is routed inside your bike.

Specifications:

Application:

All Mountain, Cross Country, Enduro, City & Touring

Type:

hydraulic, 4 pistons

Actuation:

mineral oil

Hose:

SM-BH90-SS

Hose Length (Front/Rear):

1000 mm/1700 mm

Technical Information - Caliper:

Caliper Mount:

post mount

Pads:

resin

Design:

2-piece

Calliper Material:

aluminium

Piston Material:

resin

Hose Connection:

straight

Technical Information - Lever:

Lever Length:

2-finger

Adjustment Options:

reach adjust (with tools)

Mount:

clamp (split), I-Spec EV

Design:

right (side-specific), left (side-specific)

Brake Lever Material:

aluminium

Brake Lever Housing Material:

aluminium

Hose Connection:

straight

Compatibility:

Mounting Position:

• front brake caliper: brake lever left
• rear brake caliper: brake lever right

Pads:

organic and sintered; with narrow pad shape; standard (no Ice-Tech)

Brake Rotor:

140 mm, 160 mm, 180 mm, 203 mm, 220 mm (recommended: SM-RT30, SM-RT54, SM-RT56, SM-RT64

Features:

Brake Caliper:

• 90% of the braking power of BR-MT520
• 20% more braking power compared to the BR-MT400 2-piston version
• 150% better wear resistance compared to the 2-piston version BR-MT400
• resin pistons
• painted
• steel bolts (5 mm)

Brake Lever:

• intuitive operation and high braking power
• faster brake response with shorter idle travel
• additional contact point enables stiffer lever
• I-Spec-EV compatible: 10-degree rotation angle for compatible shift lever
• funnel venting with M5 funnel
• anodised lever, painted body
• stainless steel clamp bolts

Technology:

I-Spec EV
I-Spec EV describes a variant of the connection between brake lever and shift lever on Shimano MTB derailleurs. This type of mounting allows the shifter to be adjusted both horizontally and vertically in relation to the brake lever, and ensures a tidy cockpit by reducing the number of clamps required. Compared to I-Spec and I-Spec II, I-Spec EV offers a much wider adjustment range. 14 mm adjustment range the longitudinal direction and up to 60° rotation allow an optimal ergonomic adjustment to your riding style, your sitting position and your anatomy.

One-Way Bleeding
One Way Bleeding is a technique used on Shimano calipers that facilitates brake bleeding. The hose routing has been optimised so that no air bubbles remain in the brake calliper. In combination with the funnel, the brake can be bled cleanly and easily.

J-Kit
J-Kit is a simple line connection system for hydraulic brakes from Shimano, so that you can install your brakes quickly and easily. The brake hose does not come connected to the brake to facilitate routing of the hose in the frame. The brake hose is already filled with oil in the J-Kit and sealed with a thin membrane. There is a small pin in the J-Kit brake lever that pierces this diaphragm during assembly to allow oil to flow.

Manufacturer Numbers:

Front:

EMT4204JLFPRA100

Rear:

EMT4204JRRXRA170

Contents:

• 1 x Shimano BR-MT420 + BL-M4100 disc brake, front or rear
• 1 x Shimano SM-BH90-SS brake hose, 1000 mm (front) or 1700 mm (rear)
• 1 x pair Shimano brake pads, resin
• 1 x inserts
• 1 x olives
• 2 x calliper bolts
• 1 x snap ring
• ready for installation, filled, bleeding is recommended after installation

Order Together:

• Disc Brake Adapter
• TL-BH61 tool for insert installation