GarageCalc What 275/50R22 means
275 is the section width in millimeters (10.8 in). 50 is the aspect ratio: the sidewall is 50 percent of the width, so 275 × 0.50 = 138 mm (5.4 in). R is radial construction, and 22 is the wheel diameter in inches (559 mm). Stack two sidewalls on the wheel and you get the overall diameter: 559 + 2 × 138 = 834 mm, or 32.8 in.
A full marking adds a load index and speed rating after the size, for example 275/50R22 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 275/50R22
No common size on a 21 or 23-inch wheel stays within 3 percent of 32.8 in, so 275/50R22 is best replaced like for like. The comparison calculator checks any candidate against the 3 percent guideline.
Which cars come with 275/50R22
Typical factory fitments include Chevrolet Silverado 1500, Tahoe and Cadillac Escalade 22-inch. Tire size changes with trim and wheel option, so confirm on the door-jamb placard before buying.
Frequently asked questions
How tall is a 275/50R22 tire?
32.8 inches (834 mm) in overall diameter: the 22-inch wheel (559 mm) plus two 138 mm sidewalls. Real tires land within about 1 to 2 percent of that depending on brand, tread depth and pressure.
What is 275/50R22 in inches?
32.8 x 10.8 R22: 32.8 inches tall, 10.8 inches wide, on a 22-inch wheel. The sidewall is 5.4 inches and the circumference is 103.1 inches, so the tire turns 614 times per mile.
What tire sizes are equivalent to 275/50R22?
Within 3 percent of the same diameter on the same 22-inch wheel: 285/45R22 (-2.2%). The percentage is the diameter change, which is also your speedometer error.
Can I use 285/45R22 instead of 275/50R22?
Dimensionally yes: 285/45R22 is 2.2% shorter (-19 mm) and 10 mm wider, and at a true 60 mph the speedometer would read 61.4 mph. The extra width needs about 0.20 in of clearance on each side of the tire and a rim width that suits 285 mm.