post your true tire diameters
 

trying to decide what tires to buy? so how about every body running a 285 70-75 , a 305 70-75 or a 315 70 -75 measure your tires from the ground and record it here, list your tire brand and make and true size thanks to all and happy thanksgiving !

36.7in Falkens Rocky Mountains

I believe tire rack has the true diameter size listed for each tire

The "true" size depends on more factors than Tire Rack can factor.


To the OP- true tire size will depend on weight of the vehicle, air pressure, and rim width- so expect the numbers to be off between everyone.

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Goodyear Duratracs 285-70-17 on 17x8.5 wheels.
Measures 32.5" @ 32-34 psi and 32" @ 28-30psi on Stock JKU
http://img.tapatalk.com/d/13/11/28/rusepy5e.jpg

Those are unmounted specs.

By the time you mount them on wheels and put them under the full weight of the vehicle, the actual height can be as much as 1" shorter than spec.

It depends on the width of the wheel, the weight of the vehicle, the actual psi in the tires, and the stiffness of the sidewalls.

Most tires run 0.5" to 1" shorter than spec.

37" Gooodyear MTR Kevlars with 28psi and normal load of Jeep is just shy of 36.75":yup:

I see this come up often. Yes, overall height will be less than specified when weighted. However, for the purpose of fitment, the radius is what matters. Take a 37" that actually measures 37" off a wheel. Throw the weight of a jeep on it and from the center of the hub to the ground, it is less than half of 37". From the hub center to any other point, it will be half 37". The bottom flattens, not the rest of the tire.

315 /70 r17 Duratrac mounted on 17x 8.5 wheels with 30 psi stock bumpers. Measures 33.5 inches.

285/70-17 toyo open country at2 E rated tire on stock 2014 rubicon rim with 32psi on 2014 jkur is just under 32" same tire and rim not on jeep measured is just over 32.5"
These are brand new no wear. Same tire e rated 285/75-16 on a 16x8 rim was slightly taller.

I have had others tell me their tires were taller but when measuring them on their vehicles using a carpenters level and tape measure on a smooth cement surface they are always smaller then people think.
http://i743.photobucket.com/albums/x...ps08633722.jpg