yeah I know this thread is old BUT
I was looking for something else and stumbled across this. for whoever cares Timken 203FF from the on line Giant about $7.00 get it by tomorrow with free shipping US made and if you play with singles use the same bearing on the Blast front wheel with a 17.5mm id 24mm od x 4mm thick spacer on the outside of each bearing same load ratings and way easier to find than the 62203-2rs