Product Description:Cold forged 6061 T-6 alloy arms
Hardened and heat treated 4130 chromoly spindle
ISIS spline drive technology
External BB with precision sealed bearings
110 BCD five-pin spider on drive arm
43mm sprocket/centerline offset for mini, Jr. and full-sized BMX race bikes
Colors: Black, Blue, Purple ano
Weight (arms/spindle, BB): 26.875 oz. (764g)