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TRACK/FIXED CHAINRING-144BCD-5 BOLT -CNC machined from 7075-T6 Aluminum for maximum strenght and stiffness.-144mm BCD – 5 Bolt-1/8″ tooth width for use with most track/fixed chains .Sizes: 44t, 46t, 49tColors: Silver, Black, Red, Blue, Gold, PurpleWeight: 92g/3.29 oz (46t) Show more