Andy, I am confused, I don't understand how a C range tire could weaken the steel wheel so that a D range would split the wheel? Bill Kerfoot WBCCI/VAC #5223 1973 Dodge W200 PowerWagon 1977 Lincoln Continental 1979 23' Airstream Safari and soon a 1954 double door Liner Orange, CA http://www.tompatterson.com/gallery/Bill-Beth-1979-Safari