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I don't think those are accurate measurements, you are measuring the side wall bulge which has little impact on what actually touches the ground.
What you need to measure is the contact patch, the width of the tire that actually touches the ground. By measuring the contact patch you eliminate things like rim protectors that make the side walls budge out further. Also stating just the brand of tire is useless as different models will have different variances. You should state the full tire size and model of tire.
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