im looking to buy a spare tire thats the same size of my new tires...31x10.5x15. i want to mount it under the bed in the carrier but i also want to put it on a crager soft 8 rim like what i already have and i was wondering if this will fit without trimming? ive done the research and im pretty sure the 31" tire will fit but im wondering if it still will with the new rim.

 

i think it will, if not you should at least be able to crank it up as far as it goes until it hits the lip thing.