Observed arrival · 2026-10-26
Tiremason puts the math beside the tire advice
A collection of seven free calculators for tire sizes, gear ratios, fuel costs, trip expenses, and MPG, accompanied by automotive guides.
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- Drivers comparing tire sizes, gearing, or fuel costs
- Worth noticing
- Its AWD guide distinguishes a 0.5-inch shudder threshold from a 0.75-inch destruction threshold and includes a 6.7% case study.
Field notes
The calculator lineup spans tire dimensions, drivetrain gearing, trip budgeting, and hand-calculated fuel economy. The site says it prints formulas alongside results and lists sources for assumptions such as the 3% rule, a 0.75-inch AWD threshold, and the 336 constant. Its guides acknowledge disagreement over tire-size safety, presenting both the 3% and 5% rules.
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