Section Width505 mm (19.9")
Aspect Ratio159%
Rim Diameter12"
Overall Diameter1911 mm (75.2")
Sidewall Height803 mm
Circumference6003 mm
505/159R12 — Buy Tires

Everything to know about the 505/159R12 tire size

Size geometry

A 505/159R12 tire has a 505mm section width and a 159% aspect ratio, mounted on a 12-inch rim. Sidewall height works out to 803.0mm (31.61") and overall outside diameter is 1910.7mm (75.22"). At highway speed the tire completes about 167 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 505/159R12 is unavailable, the closest same-diameter substitutes on the same rim are 495/162R12 and 515/156R12. 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 505/159R12 you can upsize to 515/153R13 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 495/165R11 (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 505/159R12 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 505/159R12

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