We (I) have done it years with 33x10.5w tires in outlaw racing. Purpose of this to flatten out the foot print of the tire to get more tire to the ground (foot print wise). I also run double beadlocks. No sealing issues. Do not know about 29.5s. So rather say somthing that could get you hurt or killed. I say call some 10.5 pros such as steve kirk,tim lynch etc.. Guys like this are easy to get in touch with a can tell you for sure with experience behind it. jmo
Brian
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "