
JT/PBR 525Z3 17/42 super reinforced chain kit — a ready-to-install transmission set for demanding riders. This kit includes a 525 pitch chain, a 17-tooth sprocket, and a standard 42-tooth steel rear sprocket, designed for intensive use and racing architecture.
Designed for the road and sustained training, this chain kit provides robustness and reliability thanks to its super reinforced design and XS-Ring seals. The combination of steel sprocket and Z3 chain offers excellent resistance to mechanical wear, while the black/steel finish maintains a sleek and technical look. Ideal for complete transmission replacement or optimization after intensive use. Be sure to check tension and lubrication after installation to maximize the lifespan of the components.