T265/75R16
123/120R E
None 3,415 lbs 80 psi 16/32" 54 lbs 7-8" 7.5" 10.5" 8.3" 31.6" 656 US
According to above specs for your tire, it is 31.6" with a tread depth of 16/32, so it potentially wears to 30.6. Base your speedo gear off this, I would recommend basing it on 31" tire size, with 3.55...