Contact
Reaching a person
Email is the way to reach a person here, and a person reads it. Corrections to any figure are the most useful mail this address gets.
Please include the size and what you expected. The arithmetic is the whole asset of this site, so a figure that looks wrong is worth more attention than anything else that could be reported.
What is worth writing about
A number that disagrees with a molded sidewall, a page that will not open, a size that has no page, or a table that reads badly on a phone. All four are fixed in a template and a rebuild rather than by editing a page.
What cannot be answered here
Whether a size fits your vehicle. That depends on rim width, load and speed ratings and clearance, none of which are in the sidewall code, and this site does not guess at them.
The address
Write to hello@tiresizeinches.com. A figure that looks wrong gets a reply from the person who wrote the formula.