Material: CNC machining high strength A7075-T651 aluminum alloy material, light weight, durable Compatibility: 110 BCD chainring, please confirm the crank BCD specification is correct before buying Tooth Type: 50-34T, 52-36T, 53-39T, support 10/11/12 speed, three kinds of double link ring set, can meet your different needs Clear Teeth: Sharp edge teeth, increase the bite force with the chain, improve riding efficiency, reduce wear Brand Purpose: BUCKLOS is committed to providing good products and professional services to meet the needs of customers, constantly upgrading products and doing innovation, to give customers a better presentation 110BCD Bike Chainring Set with Pin, Double Round 5 Bolts Aluminum Chainring 50T 34T 52T 36T 53T 39T for Road Bike Bicycle Fits 8 9 10 11 Speed Chains