255/40R19 Tire Size Specifications & Compatible Vehicles
Overall Diameter
686.6 mm
Section Width
255 mm
Sidewall Height
102.0 mm
Circumference
2157.0 mm
Revs/Mile
746
Rim Diameter
19"
Inch Equivalent
27x10R19
Rim Width (ETRTO)
7.5" – 10.0"
Compatible Vehicles
The following vehicles use 255/40R19 tires from the factory:
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 255/40R19 and may be used as replacements:
Popular Comparisons
See how 255/40R19 compares to other common tire sizes:
Understanding 255/40R19
The tire size 255/40R19 means the tire has a section width of 255mm, an aspect ratio of 40% (the sidewall height is 40% of the width), and fits a 19-inch rim.
Sidewall Height = 255 x 0.4 = 102.0 mm
Overall Diameter = (102.0 x 2) + (19 x 25.4) = 686.6 mm
Circumference = 686.6 x π = 2157.0 mm
Overall Diameter = (102.0 x 2) + (19 x 25.4) = 686.6 mm
Circumference = 686.6 x π = 2157.0 mm
Frequently Asked Questions
The 255/40R19 tire size is used on 9 vehicle trims including the 2025 Acura TLX, 2024 Acura TLX, 2021 Acura TLX and 6 more.
A 255/40R19 tire has an overall diameter of 686.6mm (27.0 inches). The sidewall height is 102.0mm, and the total circumference is 2157mm.
For 255/40R19 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 255/40R19 686.6mm diameter. Compatible alternatives include 255/45R18, 255/35R20, 255/50R17. Use our Tire Size Calculator to compare any two sizes.