TRiPEAK pulleys are engineered for smooth, precise, and long-lasting performance. Made with composite injection molding, each pulley fully encloses its bearing for a perfect fit, runs quieter, and lasts longer than conventional aluminum. Inside, G5 ceramic or stainless steel bearings deliver ultra-smooth rotation with extreme accuracy (only 0.005 mm eccentricity). The narrow-wide tooth profile improves chain engagement for stable, reliable shifting showcasing TRiPEAK's commitment to quality and performance.