Section Width165 mm (6.5")
Aspect Ratio37%
Rim Diameter20"
Overall Diameter630 mm (24.8")
Sidewall Height61 mm
Circumference1980 mm
165/37R20 — Buy Tires

Everything to know about the 165/37R20 tire size

Size geometry

A 165/37R20 tire has a 165mm section width and a 37% aspect ratio, mounted on a 20-inch rim. Sidewall height works out to 61.0mm (2.40") and overall outside diameter is 630.1mm (24.81"). At highway speed the tire completes about 505 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 165/37R20 is unavailable, the closest same-diameter substitutes on the same rim are 155/39R20 and 175/35R20. 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 165/37R20 you can upsize to 175/28R21 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 155/48R19 (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 165/37R20 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 165/37R20

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