645/12R26 Tire Size Specifications
This tire size 645/12R26 fits 0 vehicles in our database.
Everything to know about the 645/12R26 tire size
Size geometry
A 645/12R26 tire has a 645mm section width and a 12% aspect ratio, mounted on a 26-inch rim. Sidewall height works out to 77.4mm (3.05") and overall outside diameter is 815.2mm (32.09"). At highway speed the tire completes about 390 revolutions per kilometre â your speedometer and odometer were calibrated against this number.
Direct substitute sizes
If 645/12R26 is unavailable, the closest same-diameter substitutes on the same rim are 635/12R26 and 655/12R26. 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 645/12R26 you can upsize to 655/10R27 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 635/14R25 (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 645/12R26 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 645/12R26
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