This 36-tooth middle chainring (36T-MT) is specifically designed for Ultegra FC-R8000 cranksets configured either as 46-36T or 52-36T setups. It offers smooth, precise shifting for a slick 11-speed road drivetrain. Lightweight, Rigid Construction: Built from high-quality aluminum with Hollowglide design, the chainring maintains excellent stiffness while keeping weight to a minimum. It enhances power transfer and overall pedaling efficiency. 110 mm BCD & 4-Bolt Design: Designed with a 110 mm bolt circle diameter and 4-bolt mounting pattern, the chainring ensures secure attachment and exact alignment, supporting consistent shifting performance. Optimized for Crisp Shifting: The Shimano-specific tooth profile and ramp design ensure smooth chain engagement and reliable transitions between chainrings—especially under load—reducing chain drop and making shifting feel seamless. Part of the Ultegra R8000 series, this chainring works across a range of crank arm lengths and can replace worn or mismatched components, giving your setup new life with pro-level performance.