performance 130mm BCD aluminum chainrings available in five tooth counts for precise gearing and lightweight durability. Key benefits Tailor your gear ratio: choose from 45T, 47T, 53T, 56T, 58T to match riding style—climb easier, cruise faster, or optimize cadence. Lightweight and durable: machined Aluminum Alloy construction reduces rotating mass while resisting corrosion and wear. Accurate fit and reliable shifting: designed for 130mm BCD cranksets to provide secure mounting and consistent chain engagement. Specifications Available sizes: 45T, 47T, 53T, 56T, 58T BCD: 130 mm Material: Aluminum Alloy Diameters: 45T: approx. 7.7 inches (195 mm) 47T: approx. 8.1 inches (205 mm) 53T: approx. 8.9 inches (225 mm) 56T: approx. 9.3 inches (235 mm) 58T: approx. 9.6 inches (245 mm) Weights: 45T: about 80 g 47T: about 85 g 53T: about 110 g 56T: about 120 g 58T: about 135 g Performance and compatibility notes Designed to mount on cranks with a 130 mm BCD; select the tooth count that matches your desired final drive. Aluminum Alloy construction balances low weight and stiffness for efficient power transfer. Exact diameters and weights let you predict changes to wheel speed, cadence, and rotational inertia when swapping rings. Typical use scenarios Road racing: Fit a 56T or 58T to increase end speed on flats and fast group rides while keeping weight low. Training and mixed terrain: Choose a 53T or 47T to balance climbing ability and speed capability for varied routes and interval sessions. Component replacement or upgrade: a worn 45T–58T chainring on any 130 mm BCD crank to restore crisp shifting and reduce drivetrain noise. What you get A precisionmachined Aluminum Alloy chainring in the selected tooth count (45T, 47T, 53T, 56T, or 58T) with the specified diameter and approximate weight, sized for 130 mm BCD cranks. the exact tooth count you need to optimize gearing, reduce weight, and maintain reliable chain engagement on 130 mm BCD cranksets.