-Wellgo manufactures pedals for alot of companies, chances are your have a pair under your feet right now with another comapnies name on them. The MG-52's have magnesium bodies, 16 replacable pins per pedal, sealed cartidge bearings and a chromoly spindle. Thanks to lightweight magnesium they weigh a mere 15.2ozs. per pair. Available in 9/16" spindle size only. If you do pedal grinds we suggest you look at another pair of pedals.