Shimano 105 SG-X 53T Chainring 130 BCD 5-Bolt NOS New Bike Black 53-B Alloy Brand: Shimano Model: 105 SG-X 53-B outer chainring for double road cranksets. Tooth count: 53T; marked 53-39 for pairing with a 39T inner ring. Bolt pattern: 5-bolt, 130 mm BCD (per chainring sizing guide shown). Color: Black; material: alloy construction. Approximate weight: 120 grams (per scale photo). Intended for 2x road bike drivetrains using compatible Shimano 105 crank arms. Features: SG-X shift ramps and pins for improved front shifting performance. NOS with shelf wear
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