Product Description Super Road chainring. Specifications:Application:RoadMount:130 mm bolt circle diameter, 5-armTeeth:53 TGearing:2x10-speed, 2x11-speedTechnical Information:Combinations:39-53 TMaterial:aluminium (7075-T6)Features:compatible with Shimano/SRAM 10-/11-speed, Campagnolo 10-speedType: WA445-53TCNC-machinedanodisedclimbing aids made of stainless steellaser logoManufacturer Number:371-0153A Contents:1 x FSA Super Type chainring Manufacturer: F.S.A. S.R.L. Via Francesco Petrarca. 4 20123 Milan Italy info@fullspeedahead.com