Tire size cross-reference
Vehicles with 245/40R18 tires
245/40R18 — 245 mm wide, 40% aspect, 18″ rim, 25.7″ overall diameter. 1 vehicles in our data use this size.
| Vehicle | Trim(s) | Details |
|---|---|---|
| Mercedes-Benz C-Class | C 300 (rear) | View → |
Same size ≠ same tire
Every vehicle above runs 245/40R18 tires, but they may need different load indices and speed ratings. A 245/40R18 tire rated for a sedan won't necessarily handle an SUV's weight. Match the full spec on your door-jamb placard — size alone isn't enough.
FAQ
What vehicles use 245/40R18 tires?
In our data, 1 vehicles use 245/40R18, including Mercedes-Benz C-Class. More are being added.
What is the overall diameter of 245/40R18?
245/40R18 tires have an overall diameter of 25.7″ (653.2 mm), with a 98 mm sidewall height. The section width is 245 mm.
Are 245/40R18 tires interchangeable between these vehicles?
They're the same physical tire size, so they'll fit the rim — but each vehicle may require different load ratings, speed ratings, and TPMS calibration. Always match the specs on your door-jamb placard, not just the size.
Vehicle lists reflect documented OEM tire fitments and are a starting reference. Confirm tire size, load rating, and speed rating against the door-jamb placard or owner's manual before buying tires.