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The GP4-RS is a cast aluminum monobloc radial caliper built for 108mm radial mounts. Its body is machined from a single casting for rigidity, and it uses four 30mm pistons with sintered pads included. The smaller pistons give a softer, more progressive lever feel than the 34mm M4, which suits riders keeping the stock front master cylinder. It is a track-derived upgrade for sport and naked bikes, though custom spacers may be needed depending on the fork and bracket.
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The Brembo GP4-RS is a cast monobloc brake caliper that uses the same technology used in MotoGP. The caliper body is machined from a single cast aluminum workpiece for optimal rigidity. The Brembo logo is embossed and painted in classic Brembo Red.
It has four 30mm pistons. These are smaller than the 34mm pistons of the Brembo 108mm M4 Monobloc Caliper and give an optimized feel at the lever, especially with an OEM front brake master cylinder. Brembo sintered brake pads are included.
The caliper fits a 108mm radial mounting attachment and is ABS compatible. Custom spacers might be required depending on the application.
