135/78R20 Tire Size Specifications
This tire size 135/78R20 fits 0 vehicles in our database.
Everything to know about the 135/78R20 tire size
Size geometry
A 135/78R20 tire has a 135mm section width and a 78% aspect ratio, mounted on a 20-inch rim. Sidewall height works out to 105.3mm (4.15") and overall outside diameter is 718.6mm (28.29"). At highway speed the tire completes about 443 revolutions per kilometre â your speedometer and odometer were calibrated against this number.
Direct substitute sizes
If 135/78R20 is unavailable, the closest same-diameter substitutes on the same rim are 125/84R20 and 145/73R20. Both keep your speedometer reading within 1% â safe for daily use, ABS, and stability control. Always verify load and speed ratings before swapping.
Plus / minus sizing options
For a 135/78R20 you can upsize to 145/64R21 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 125/94R19 (minus-one) for a softer ride or winter setup. Both stay inside the Âą3% diameter tolerance that ABS and TPMS systems expect.
Vehicle compatibility
0 vehicles in our database run the 135/78R20 tire size from the factory. Aftermarket fitment depends on rim width, offset, and clearance â match these specs to your wheel before purchasing tires.
Vehicles Using 135/78R20
tire_size.no_vehicles_found