Hauptbremszylinder

Radial master cylinders from Brembo and Talos — the racing standard for brake and clutch control, with the leverage ratios that give one-finger braking its precision.

The numbers on a radial pump (19x18, 19x20) describe piston diameter and lever ratio: shorter ratios give a firmer, more direct bite; longer ones more modulation. Match the pump to your caliper's piston volume — every listing notes its intended pairing — and budget for a matching reservoir kit if your setup needs one.