Did some more digging. The rolling diameter of the tire is the 25inches number. I'm guessing this is slightly less than full tire diameter given the weight on and flattening of the tire? That makes sense. From there it should just be simple trig calculations to achieve the degree to inches conversion.
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Trey
Current ride: 2001 BMW 540iT soon to be manual swapped.
Former rides: 1979 Trans Am WS6: LT1/T56, Kore 3 C5/6 brakes, BMW 18in rims
00 BMW 540i/6: Suspension, wheels, and ACS bits.
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