Alize Chainrings are 130 PCD Shimano Compatible
- Silver or Black TA only make their chainrings from the best 7075 T6 heat treated aluminium sheet. The teeth are cut in the traditional manner on a lathe which produces a much better & more accurate tooth form than pressing which is used by most chainring manufacturers. Bolt circle diameters of common cranks: Single 130, 135, or 144 BCDRoad double 130 BCD (Shimano & others), or 135 (Campagnolo) Road triple 130/74 BCD (Shimano & others), or 135/74 BCD (Campagnolo) Compact/touring double 110 BCD or (Campagnolo carbon 4110/1113 BCD) Compact/touring triple 110/74 BCDMountain bike (4 arm)104/64 BCDMountain bike (5 arm standard) 110/74 BCDMountain bike (5 arm compact) 94/58 BCD For an extensive list of bolt circle diameters & their applications, see Sheldon Brown's Bolt Circle Diameter Crib Sheet.