Section Width135 mm (5.3")
Aspect Ratio420%
Rim Diameter26"
Overall Diameter1794 mm (70.7")
Sidewall Height567 mm
Circumference5637 mm
135/420R26 — Buy Tires

Everything to know about the 135/420R26 tire size

Size geometry

A 135/420R26 tire has a 135mm section width and a 420% aspect ratio, mounted on a 26-inch rim. Sidewall height works out to 567.0mm (22.32") and overall outside diameter is 1794.4mm (70.65"). At highway speed the tire completes about 177 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 135/420R26 is unavailable, the closest same-diameter substitutes on the same rim are 125/454R26 and 145/391R26. Both keep your speedometer reading within 1% — safe for daily use, ABS, and stability control. Always verify load and speed ratings before swapping.

Plus / minus sizing options

For a 135/420R26 you can upsize to 145/382R27 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 125/464R25 (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 135/420R26 tire size from the factory. Aftermarket fitment depends on rim width, offset, and clearance — match these specs to your wheel before purchasing tires.

Vehicles Using 135/420R26

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