135/421R27 Tire Size Specifications
This tire size 135/421R27 fits 0 vehicles in our database.
Everything to know about the 135/421R27 tire size
Size geometry
A 135/421R27 tire has a 135mm section width and a 421% aspect ratio, mounted on a 27-inch rim. Sidewall height works out to 568.4mm (22.38") and overall outside diameter is 1822.5mm (71.75"). At highway speed the tire completes about 175 revolutions per kilometre â your speedometer and odometer were calibrated against this number.
Direct substitute sizes
If 135/421R27 is unavailable, the closest same-diameter substitutes on the same rim are 125/455R27 and 145/392R27. 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 135/421R27 you can upsize to 145/383R28 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 125/465R26 (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 135/421R27 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 135/421R27
tire_size.no_vehicles_found