GarageCalc What 275/60R15 means
275 is the section width in millimeters (10.8 in). 60 is the aspect ratio: the sidewall is 60 percent of the width, so 275 × 0.60 = 165 mm (6.5 in). R is radial construction, and 15 is the wheel diameter in inches (381 mm). Stack two sidewalls on the wheel and you get the overall diameter: 381 + 2 × 165 = 711 mm, or 28.0 in.
A full marking adds a load index and speed rating after the size, for example 275/60R15 91V. Those two codes set how much weight and speed the tire is certified for; look them up in the load index chart and the speed rating chart.
Plus and minus sizing from 275/60R15
No common size on a 14 or 16-inch wheel stays within 3 percent of 28.0 in, so 275/60R15 is best replaced like for like. The comparison calculator checks any candidate against the 3 percent guideline.
Frequently asked questions
How tall is a 275/60R15 tire?
28.0 inches (711 mm) in overall diameter: the 15-inch wheel (381 mm) plus two 165 mm sidewalls. Real tires land within about 1 to 2 percent of that depending on brand, tread depth and pressure.
What is 275/60R15 in inches?
28.0 x 10.8 R15: 28.0 inches tall, 10.8 inches wide, on a 15-inch wheel. The sidewall is 6.5 inches and the circumference is 87.9 inches, so the tire turns 720 times per mile.
What tire sizes are equivalent to 275/60R15?
No common size lands within 3 percent of 28.0 inches on the same or adjacent wheel diameters, so this size has no direct drop-in alternative.