The pedal body gives a wide, stable platform and immediately on launch bested other clipless pedals on the market, it is near impossible to accidentally pull your foot out of the pedal in a sprint. As far as the internals, you will find three sets of bearings, two ball bearing and one roller (needle) bearings. Its a very resilient design that helps transmit load evenly along the tough nickel plated chrome-moly axle spindle.