Sorry, 9/16 not 5/8, see post above, use adaptors from Harris Cyclery...gclark8 said:The cranks look like "BMX" arms, 1/2", the pedals are 5/8", there is not enough meat in the crank arms to re-tap the threads to 5/8.
Either use old pedals, or buy a new crankset, a TX71 Shimano and matching BB would be the go...