As long as they are 5° design you're fine. I didn't think they sold them anymore, though. I know they sold them back in the '80s when radials were first coming on the market, but I haven't seen them in the catalogs lately. Of course, maybe I'm not looking for them either. How long ago did you buy them? I do hear every so often of the Dodge motorhome folks using an oddball tube type 7.50 x 17 radial with their "lock rings" that Michelin I guess still makes. Stu