The Brembo Racing 15RCS brake master cylinder for 1 inch handlebars on Harley Davidson is designed to offer unmatched control, precision, and top-tier performance, thanks to the Ratio Click System (RCS), which allows the lever ratio to be adjusted between 18 mm (more modular) and 20 mm (more responsive), tailoring the braking response to the rider?s style. Equipped with a MotoGP-derived internal piston, this master cylinder ensures progressive and powerful braking. The forged aluminum CNC-machined body with a hard anodized finish provides durability, lightweight construction, and exceptional resistance, while the folding lever enhances safety by reducing breakage risk in case of a fall.