115/121R14 Tire Size Specifications
This tire size 115/121R14 fits 0 vehicles in our database.
Everything to know about the 115/121R14 tire size
Size geometry
A 115/121R14 tire has a 115mm section width and a 121% aspect ratio, mounted on a 14-inch rim. Sidewall height works out to 139.2mm (5.48") and overall outside diameter is 633.9mm (24.96"). At highway speed the tire completes about 502 revolutions per kilometre â your speedometer and odometer were calibrated against this number.
Direct substitute sizes
If 115/121R14 is unavailable, the closest same-diameter substitutes on the same rim are 105/133R14 and 125/111R14. 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 115/121R14 you can upsize to 125/101R15 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 105/145R13 (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 115/121R14 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 115/121R14
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