What 215/60R16 means
The inputs are 215 mm nominal section width, a 60-percent aspect ratio, and a 16-inch nominal rim diameter. The R identifies radial construction. The width is not a wheel-width measurement, and the rim number is not the outside diameter of the tire.
Nominal sidewall height is 215 × 60 ÷ 100 = 129 mm. Adding two sidewalls to the 406.4 mm rim gives 664.4 mm (26.16 in) of nominal outside diameter.
A calculated reference
A 60-percent ratio at 215 mm gives a 129 mm sidewall. The curated 215/65R16 comparison adds 10.75 mm per side. Half the diameter difference is a nominal radius change, not a measured increase in body or suspension clearance.
Using a perfect-circle model, circumference is 2087.27 mm, equivalent to 479.09 revolutions per kilometer or 771.03 per mile. These are derived from unrounded diameter; actual rolling circumference also depends on the product and operating conditions.
Source and scope
General Tire’s AltiMAX RT45 source includes 215/60R16, article 15576290000. It was checked on October 27, 2026. That record verifies the published marking used here; it does not turn these calculated dimensions into that product’s measured specification or establish availability.
Use the exact product and vehicle requirements for load and speed ratings, permitted rim dimensions, inflation and clearance. Nominal geometry alone cannot verify fitment, braking behavior, handling or safety.
Sources and further reading
- AltiMAX RT45 — General Tire
- Tire Markings Explained — Michelin
- Tire glossary — Michelin