Profile Racing Imperial Sprocket 19MM is CNC machined from 6061 aluminum in the USA. It is a “bolt on” style requiring a sprocket bolt to be attached to the crank arm. It is available for 19mm axles only, with a 3/32" tooth width, and comes with a 19mm silver steel insert. It offers the largest selection of sizes and colors of any sprocket available, including Silver & Black (23t-30t) and Red, Blue, Gold, Green, Purple, Aqua, & White (23t, 25t, 28t, 30t).
