Which tire size - 205/75R15 or 225/75R15
I'm looking to upgrade my TT tires and wheels from 14" to 15" and am undecided on whether to get 205 or 225 (75R15's). In my case I have ample room for either size. I know the 225's are rated for a ...
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How much over-capacity is desirable seems to be a judgement call. I have seen some recommend at least 125% tire capacity to load ratio. I haven't seen the logic for that number. When I replaced the 4 year old OEM tires, I went up one size from 205 to 225 and up one load range from C to D. The OEM tires were rated at 104% of the axles at 50 psi. The replacement tires are rated at 145% of the axle rating and 170% of the actual load at 65 psi. The E load range at 80 psi just seemed to be overkill to me.
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