Charles,
Fellow Pogger Bruce Harris better known as "0533" owned a 1999 Marathon XLV single slide he had Prevost JaX adapt the 365 tires on the steer and tag. We have not had good luck at Prevost Dallas for anything. I would call JAX. Hey check this out on the completed items on Ebay. 1995 Marathon 45'er with 445's on the drive, not being duals, and 365's on the tag.
Be sure to scroll down past all the little stuff at the top.
http://cgi.ebay.com/ebaymotors/1995-...item45f65d3b1a
Jim and Chris
2001 Featherlite Vogue XLV 2 slide with Rivets-current coach, 1999 shell
Previous 22 years,
We have owned every kind of Prevost shell but an H3-40