The Omnium track crank model from TruVativ features an integrated spindle and designed for external bottom brackets (purchased separately: SRAM GXP and equivalents). The stock gear with which the crank comes is a 48 tooth (1/8") CNC machined 7075 T6 aluminum chainring. Other chainrings that conform to the 144 mm bolt circle pattern may be fitted.
We typically stock 165, 167.5 and 170 lengths (172.5 and 175 available by special order). Pedal threads: 9/16×20 (the common standard for current pedal models).