Complete Guide to Brembo Brake Calipers (2025 Edition) | EZ Motor

Explore the 2025 complete guide to Brembo brake calipers, including GP4 series, STYLEMA, M4, and P4 axial models. Compare specs, features, photos, and find the ideal brake upgrade for your motorcycle with EZ Motor.

Brembo brake systems are a global benchmark in racing and high-performance street motorcycles. Their stopping power, modulation, and durability make them a top choice among enthusiasts.

However, Brembo offers many caliper models—making it difficult to choose the right one for your motorcycle.

This 2025 guide from EZ Motor breaks down every important Brembo caliper, explains their differences, and helps you decide which one suits your riding style.

1. Radial-Mount Calipers

Radial calipers are the most common system on modern sport bikes. They offer excellent rigidity, better feedback, and enhanced compatibility with larger rotors.

Japanese bikes typically use 108mm pitch, while European bikes often use 100mm.

GP4-MS Caliper

Key Features:

* CNC monoblock construction

* 100mm pitch

* 30mm pistons (4-piston)

* Nickel-plated surface

* Approx. 945g including pads

The GP4-MS is Brembo’s high-end street/track caliper, loved for its precision and heat stability.

GP4-MS (108mm Version)

Upgrades:

* Designed for Japanese models (108mm)

* Additional cooling fins for **15–20% better heat dissipation

* Similar internal performance to the 100mm model

Great for riders who demand performance during extended braking.

GP4-RX Caliper

Specs:

* CNC 2-piece construction

* Available in 108mm / 100mm / 130mm pitch

* 32mm pistons

* Weight: 830g–1000g depending on pitch

A lightweight, race-inspired caliper known for razor-sharp modulation.

484 Café Racer Caliper

Details:

* CNC 2-piece design

* 108mm or 100mm pitch

* 32mm pistons

* 950g weight

Ideal for retro, café racer, and custom builds with its organic, flowing design.

GP4-RB Caliper

Highlights:

* CNC 2-piece

* 30/34mm staggered pistons

* High rigidity mechanical design

Excellent for riders who want both stopping power and control.

GP4-RS Caliper

Features:

* Cast monoblock design

* 108mm pitch

* MotoGP-style cooling fins

* ~930g weight

A cost-effective high-performance option with finned cooling structure.

STYLEMA Caliper

Specs:

* Cast monoblock

* 100mm pitch

* 30mm pistons

* Lightweight: ~865g

* Titanium grey or black anodized finish

Favoured for its compact size and superior responsiveness.

M4 Caliper

Details:

* Cast monoblock

* 100mm or 108mm

* 34mm pistons

* ~1,010g weight

* Multiple color options

A popular upgrade for riders wanting MotoGP-like rigidity at a practical cost.

2. Axial-Mount Calipers

Axial-mount calipers use a 40mm pitch and remain popular on classic, vintage, and custom bikes. They offer excellent brake feel and retro aesthetics.

P4-40RR Caliper

Highlights:

* CNC machining

* Titanium pistons + bolts

* 30/34mm pistons

* Ultra-light 600g

The premium axial option for serious performance builds.

P4-40RB Caliper

Specs:

* CNC 2-piece

* Aluminum pistons (30/34mm)

* ~780g weight

A more budget-friendly twin of the RR model.

P4-40C Caliper

Features:

* Cast construction

* 30/34mm pistons

* ~880g

* Anodized finish with Italian accent trim

Great for stylish customs without overspending.

P4-40R Caliper

A long-standing classic axial caliper known for reliability and consistent performance.

3. How to Choose the Right Brembo Caliper

✔ Confirm your motorcycle’s mounting pitch

Radial: 100mm / 108mm / 130mm

Axial: 40mm

✔ Define your usage

* Track/racing → CNC monoblock

* Street/touring → Cast or mid-range CNC

* Cafe/custom → Axial calipers for looks & feel

✔ Consider cooling performance

Finned calipers (e.g., GP4-MS 108mm) are best for long-distance or aggressive braking.

✔ Check weight

Lower unsprung mass improves handling.

✔ Choose a design that matches your build

Colors, finishes, and body shape influence the bike’s overall look.