The Profile Racing No Boss crank arms are designed to work with spline-drive sprockets or spiders only.
SPINDLE FIT: fits 19mm 48-splined spindle, not included
MATERIAL: U.S.A. made chromoly tapered arms
PEDAL FIT: 9/16" (standard for 3pc cranks)
INCLUDES: Both right and left crank arms
BOTTOM BRACKET AND SPINDLE SOLD SEPARATELY
Weight: 20.1oz/572g (175mm arms - pair)