Outer Limits 4x4 Board

ive just been givena old spare tyre that ill just use as a second spare. its a 15x7 rim. Currently on my tojo ive got 15x8 rims (all sunraysias) the tyres on my truck at the mo are 31x11.5x15R on the recently aquired wheel the tyre is 31x10.5x15R. I guess what i simply wanna know is it wrong to have theses different rim sizes on at the same time? again its only gunna be used as a second spare

nope, all good

If you use it when 4x4 is engaged you may get slight wind up... but not likely to occur... As its a 2nd spare I wouldn't worry about it.

good stuff, thanks guys