185/420R10 Tire Size Specifications
This tire size 185/420R10 fits 0 vehicles in our database.
Everything to know about the 185/420R10 tire size
Size geometry
A 185/420R10 tire has a 185mm section width and a 420% aspect ratio, mounted on a 10-inch rim. Sidewall height works out to 777.0mm (30.59") and overall outside diameter is 1808.0mm (71.18"). At highway speed the tire completes about 176 revolutions per kilometre â your speedometer and odometer were calibrated against this number.
Direct substitute sizes
If 185/420R10 is unavailable, the closest same-diameter substitutes on the same rim are 175/444R10 and 195/398R10. 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 185/420R10 you can upsize to 195/392R11 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 175/451R9 (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 185/420R10 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 185/420R10
tire_size.no_vehicles_found