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Old 01-09-2017, 08:02 AM
aroundincircles aroundincircles is offline
Ford Tough
 
Join Date: Oct 2016
Posts: 318
Default Stock tire size?

Is there any way to figure out what tire size my truck came with stock?

I'm trying to judge correct speed/miles driven, etc. My truck currently has 31" tires on it, (31x10.5r15). I assume that the odometer is off a ring gear in the transmission like it is in my jeep, and not software defined like it is on newer vehicles.

When I go online it looks like there were 3 tire size options, 215/235/265 75r15.

That's a pretty big difference between the three sizes, and I assume the ring gear is based off the original size.
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98 Mazda B4000 4x4 31" tires
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