There must be a few guys on this board that work in a tire shop or tire supplier that could post up some tire weights. I'm looking for the lightest 31" tire in 12.5" width or 10.5". Basically, who makes the lightest Mud terrain tires, I would like the Pro-Comp X-Terrain and Mickey Thompson Baja's to be in the weigh in if possible, I had 35" Pro-Comp X-terrain on my '06 F-350 and they were great, I was very surprised. Anyone? I can only run stock gears for awhile so the lightest unsprung weight the best. I'm going with an alloy wheel like Pro-Comp Series 8179 more then likely. Thanks a bunch if you can help.

Well I run a 31x10.5 MT Radial called baja claw.  They are some cheap version I got at fleetfarm for 98.99 each.  I love those things they work well in everything. (2nd set) Recently a guy I know had 31x10.5 super swampers on and we had to change one because we blew a bead on the trail.  I lifted his, wow they probally were double the weight of mine....

Try this site. Not the best selection, but good info. (select a tire & click on "SPECS").
http://www.tirerack.com/tires/types/maxtrac.jsp

I think you can check manufacturers websites, they should have a clicky for "technical data" or "specs" and all the info should be there.

Just from poking around on manufacturers websites I've found the Pro-Comp X-terrain to be the lightest, claimed weight is 43lbs for a 31"x 12.50". Most other brands of similar size were around 50lbs. Boggers of the same sixe were 57lbs. I know the X-terrains wont chew as good as a bogger or a couple other tires but like I mentioned before I had 35" X-Terrains on my previous Truck when I was still living in Canada and they did great so I'm sure thats what I'll go with for now. Its a real drag that I can't gear my diffs alot lower. I would still like to see real world numbers as apposed to claimed weight if possible. Thanks.