Section Width635 mm (25.0")
Aspect Ratio20%
Rim Diameter11"
Overall Diameter533 mm (21.0")
Sidewall Height127 mm
Circumference1676 mm
635/20R11 — Buy Tires

Everything to know about the 635/20R11 tire size

Size geometry

A 635/20R11 tire has a 635mm section width and a 20% aspect ratio, mounted on a 11-inch rim. Sidewall height works out to 127.0mm (5.00") and overall outside diameter is 533.4mm (21.00"). At highway speed the tire completes about 597 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 635/20R11 is unavailable, the closest same-diameter substitutes on the same rim are 625/20R11 and 645/20R11. 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 635/20R11 you can upsize to 645/18R12 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 625/22R10 (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 635/20R11 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 635/20R11

tire_size.no_vehicles_found