There is an offer on at the moment for Kwik Fit, two branches in Northern Ireland, e.g. 225x70x15 Michelin Agilis camping ,fitted , balanced with new valve core if steel stems .If not a new valve complete and old tyre disposal for £107.25. I use this one in preference to 215x70x15 ,a litte more rubber on the ground and better braking. There are other makes on offer.