The tread width, measured wall to wall.
Sidewall height is 40% of the width — about 94 mm.
The wheel diameter it fits.
Derived from the size code. Two tyres with the same overall diameter can often interchange even when the size is not identical — confirm against your door placard.
| Size | Used (typical) | New (typical) |
|---|---|---|
| 235/40R18 | $50 – $85 | $140 – $240 |
South Florida market reference ranges, per tyre fitted. Not a quote and not live stock — the final price depends on tread, brand and the shop.
General guidance. Always confirm the size against your driver-side door placard or the tyre currently on the car.
Low profile (40%): the sidewall is short and absorbs little, so potholes and kerbs damage it easily. On a used tyre in this size, inspect the sidewall closely for cuts, bulges or repairs — and reject any of them.
Send us the size and we will tell you what local Miami shops have today and what it costs.