have read a couple posts about the viscous coupler recently and tire size. so, how much would running a spare of the same size tire, but different make effect it, in order to get somewhere to get it fixed? I ask as my tires are 32x11.5? i think, sport kings. my spare is a 31x10.50, which im going to be giving to my 60 and buying a matching size for the 80. i like my bfg a/ts and was thinking of going with the m/ts next set i buy. since the spare wont see much use would like to get something that can rotate with the next set. the sport kings have at least 50% tread on them though and are pretty decent in the mud. any thoughts? anyone know who makes the sport kings?