Tire sizes
Used 245/45R18 tires
Need 245/45R18 tires? Message us your size and we will check our used stock. This low-profile size is about 26.7 in tall with roughly 4.3 in of sidewall, common on larger sedans with sport-leaning setups.
- Width
- 245 mm
- Sidewall
- 110.3 mm (4.3″)
- Overall height
- ≈ 26.7″
- Revs per mile
- ≈ 756
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What does 245/45R18 mean?
It is a radial tire 245 mm wide with a sidewall 45% of that width, for an 18 inch wheel.
That gives about 110.3 mm, or 4.3 in, of sidewall and an overall diameter of about 26.7 in. It turns roughly 756 times per mile.
What sizes are close to 245/45R18?
Among common sizes, 215/55R17 (about 26.3 in) is within about 1.4% of 245/45R18 in diameter, and 215/60R16 (about 26.2 in) is within about 2%.
Both are much narrower tires on smaller wheels, which changes grip and handling. Alternate sizes should stay within about 3% of the original diameter and be checked against your vehicle placard.
Why does the speed rating matter on used 245/45R18 tires?
The speed rating is the letter after the load index, and it should be equal to or higher than what your placard lists. For example, H is rated to 130 mph, V to 149 mph and W to 168 mph.
Lower-profile sizes like this often come with higher speed ratings from the factory, so check that letter before you buy.
Also look for cupping or feathered edges on the tread, which point to suspension or alignment wear. Call or text us your full size and we will look.
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