255/50R17 Tire Size Specifications & Compatible Vehicles
Overall Diameter
686.8 mm
Section Width
255 mm
Sidewall Height
127.5 mm
Circumference
2157.6 mm
Revs/Mile
746
Rim Diameter
17"
Inch Equivalent
27x10R17
Rim Width (ETRTO)
7.5" – 10.0"
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 255/50R17 and may be used as replacements:
Understanding 255/50R17
The tire size 255/50R17 means the tire has a section width of 255mm, an aspect ratio of 50% (the sidewall height is 50% of the width), and fits a 17-inch rim.
Sidewall Height = 255 x 0.5 = 127.5 mm
Overall Diameter = (127.5 x 2) + (17 x 25.4) = 686.8 mm
Circumference = 686.8 x π = 2157.6 mm
Overall Diameter = (127.5 x 2) + (17 x 25.4) = 686.8 mm
Circumference = 686.8 x π = 2157.6 mm
Frequently Asked Questions
The 255/50R17 is a standard tire size. Check your vehicle door jamb sticker or owner manual to confirm compatibility.
A 255/50R17 tire has an overall diameter of 686.8mm (27.0 inches). The sidewall height is 127.5mm, and the total circumference is 2158mm.
For 255/50R17 tires, the ETRTO recommended rim width is 8.5". The acceptable range is 7.5" minimum to 10.0" maximum. Using a rim outside this range can cause improper bead seating and unsafe handling.
Yes, as long as the replacement tire overall diameter is within 3% of the 255/50R17 686.8mm diameter. Compatible alternatives include 165/85R16, 255/55R16, 255/45R18. Use our Tire Size Calculator to compare any two sizes.