You also need to make sure that the BB you buy for the myita to use the racer crank on has the same taper as the racer crank.You did not mention crank brand on the racer,but campy and most other european cranks/BB use ISO taper and oriental cranks are mostly JIS.They are technically incompatible,but compatible enough that things can be mismatched either way without disastrous results,but once done,you cannot go back the other way without consequences.