CJ7nvrstk
Member
Youre measuring off the crown. That's not an accurate measurement. You need to measure off the lowest POC. Looks to be about 38 & 3/8" for that "40". You are not considering the compression.I had the same tires on a heavily modified/heavy weighted JKU and they measured 37 even under the jeep.
I currently have the 40s on a heavily modified JLU and they measure 39 even.
The most accurate way to measure actual diameter is to go 1/2 at the hub and multiply x2.
You're measurements are inaccurate.
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