In curves with 400 m radius, the transverse cracks occur on the outer wheels of the rear wheelset (wheels 3L and 6L) for the locomotives with C0-C0 bogies, and located on the band of 65–95 mm from flange back (mainly concentrated on 80 mm). While for the locomotives with 2(B0-B0) bogies, the cracks occurring on the outer wheels of rear wheelset (wheels 2L and 4L) are located on 60–80 mm from flange back (concentrated on 65 mm), which have more chance to wear off.