Section Width115 mm (4.5")
Aspect Ratio691%
Rim Diameter12"
Overall Diameter1894 mm (74.6")
Sidewall Height795 mm
Circumference5950 mm
115/691R12 — Buy Tires

Everything to know about the 115/691R12 tire size

Size geometry

A 115/691R12 tire has a 115mm section width and a 691% aspect ratio, mounted on a 12-inch rim. Sidewall height works out to 794.6mm (31.29") and overall outside diameter is 1894.1mm (74.57"). At highway speed the tire completes about 168 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 115/691R12 is unavailable, the closest same-diameter substitutes on the same rim are 105/757R12 and 125/636R12. 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 115/691R12 you can upsize to 125/626R13 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 105/769R11 (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 115/691R12 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 115/691R12

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