Rear hex works with losi wheels, provided the nut fits into the wheel indent. The jconcept mono for 22 fits the nut/driver fine, but the losi brand wheel has too small of an indent for an 11/32 nut. Same offset on the mono for associated or 22, visually comparing with one on each side.

The 22 front doesn't work with the associated/proline/jconcepts hex. The 22 hex is smaller.