Product Description The TA Sismic is a chainring for older Shimano XTR cranks. Specifications:Application:Cross Country, All MountainAttachment:64 mm bolt circle diameter, 4-armTeeth:22 TGearing:3x9-speedTechnical Information:Material:aluminium (7075-T6)Compatibility:Shimano XTR 2008 - 2010 (FC-M970)Position: innerFeatures:milled from a blockCNC manufactureddesigned and produced in FranceManufacturer Number:22 tooth:PL-41064179-22Contents:1 x TA Sismic chainring Weight: grey | 24 : 19 g Manufacturer: Spécialités T.A. 41 bis rue de Laon 02150 Sissonne France france@specialites-ta.com