Flow Pedals bolt directly to a 48-spline spindle. They work with American, Mid, Spanish, and Euro bottom brackets.

Curbrider Flow Pedals - Pronunciation [kurb-rahy-der floh ped-ls]: A device that allows bicycles to move along as though in a stream circulating among transitioned surfaces which are used to accelerate.

What comes in the package

Two Flow Pedals, two bolts (either 7/16 or 3/8)