I wouldn't put a 33x10.50 on a 8.5" rim. That's way too wide of a rim. Keep 'em on the stock rims, they'll be fine. My 33x10.50s fit fine on the stock rim and I would think that putting them on a 8.5" rim would really expose the rim to damage. My tires barely protect the rim.
I don't see why the 33" AT wouldn't fit under the Xterra, you'll have some rubbing, but oh well. Also, you don't have any agressive lugs to cause any real rubbing damage like my tires, so you shouldn't have much to worry about.
I believe Interco's web site incorrectly reports the diameter of the TSL/Radial. According to both National Wheel & Tire and OK4WD the diameter of the 33x10.50 TSL/Radial is 32.9", not like that makes much of a difference.
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Michael GirardoMember - MAXC | Moderator - XOC
www.avaloninternet.net/users/bythebay/xterra <---Redesigned
[This message has been edited by swampwrecker (edited 02-12-2001).]