2018 Ford Ford Mustang — Fastback EcoBoost
The 2018 Ford Ford Mustang Fastback EcoBoost shipped with 3 different factory tire sizes, depending on the wheel package it left the factory with (this can also reflect a staggered front/rear setup). Check your tire sidewall or door placard to confirm which one applies to your vehicle.
This trim shipped with more than one tire size (staggered fitment, front/rear, or optional wheel package). Confirm which one matches your vehicle by checking your tire sidewall or door placard.
235/55R17
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 55% (129.3 mm) |
| Rim diameter | 17" |
| Overall tire diameter | ~27.2" |
| Revolutions per mile | ~742 |
- Check 235/55R17 price at TireRack
- Check 235/55R17 price at SimpleTire
- Check 235/55R17 price at Priority Tire
Some links on this page are affiliate links — see our disclosure.
235/50R18
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 50% (117.5 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~27.3" |
| Revolutions per mile | ~740 |
- Check 235/50R18 price at TireRack
- Check 235/50R18 price at SimpleTire
- Check 235/50R18 price at Priority Tire
Some links on this page are affiliate links — see our disclosure.
255/40R19
| Section width | 255 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (102 mm) |
| Rim diameter | 19" |
| Overall tire diameter | ~27" |
| Revolutions per mile | ~746 |
- Check 255/40R19 price at TireRack
- Check 255/40R19 price at SimpleTire
- Check 255/40R19 price at Priority Tire
Some links on this page are affiliate links — see our disclosure.
Other 2018 Ford Ford Mustang trims
- Convertible EcoBoost 235/55R17 / 235/50R18 / 255/40R19
- Convertible EcoBoost Perfromance Pkg 255/40R19
- Convertible EcoBoost Premium 235/50R18 / 255/40R19 / 265/35R20
- Convertible GT 235/50R18 / 255/40R19
- Convertible GT Performance Pkg 255/40R19 / 275/40R19
- Convertible GT Premium 235/50R18 / 255/40R19 / 265/35R20
- Fastback EcoBoost Performance Pkg 255/40R19
- Fastback EcoBoost Premium 235/50R18 / 255/40R19 / 265/35R20
- Fastback GT 235/50R18 / 255/40R19
- Fastback GT Performance Pkg 255/40R19 / 275/40R19
- Fastback GT Premium 235/50R18 / 255/40R19 / 265/35R20
- Shelby GT350 295/35R19 / 305/35R19
- Shelby GT350R 305/30R19 / 315/30R19
How to read a tire size
A tire size like 225/45R17 breaks down into three parts:
the first number is the section width in millimeters
(the tire's width from sidewall to sidewall), the second is the
aspect ratio — the sidewall's height as a percentage of
that width — and the number after the "R" is the rim
diameter in inches. A letter prefix (P or LT) indicates
Passenger or Light Truck construction; its absence usually means
Euro-metric sizing.
Some trucks and off-road tires instead use "flotation" sizing, like
37X12.50R17 — here the numbers are the tire's overall
diameter and width in inches directly, with the rim diameter last.
Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.