Do you have the same rim tape on both wheel?
Secondly, did you push the tyre bead onto the middle of the rims first?
The latter may be why the rear tyres got on easily.
Yes, same rim tape on both wheels. Also tried pushing the tyre bead into the middle, didn't seem to make any difference.
@Fox started
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Do you have the same rim tape on both wheel?
Secondly, did you push the tyre bead onto the middle of the rims first?
The latter may be why the rear tyres got on easily.