20×10 ET40 Wheels on a 2012 Ford Mustang

4 documented builds specifically using ET40

Show evidence for this exact wheel size and offset on my vehicle/year. Exact size+offset builds are observational evidence only — not a universal fit, not the “correct” offset, and not a no-rub guarantee.

Evidence summary

Documented builds using 20×10: 34
Documented builds specifically using 20×10 ET40: 4
Axle context: 0 square · 4 staggered · 0 front-only · 4 rear-only · 0 both axles

4 documented 2012 Ford Mustang builds in our database use 20×10 ET40 wheels. This is observed use — not a fit confirmation.

Compared with OEM

Aftermarket: 20×10 ET40

Compared with the OEM 19×8.5 ET50 configuration.

Width: +1.5 in

Outer edge 29.1 mm farther toward fender (more outward poke)

Inner edge 9.1 mm closer to suspension (less inner clearance)

Geometry is deterministic vs the named OEM baseline. It does not mean the setup fits or will clear.

Tires documented with 20×10 ET40

275/35R20 — 1 build
295/30R20 — 1 build
295/35R20 — 1 build
315/35R20 — 1 build

275/35R20: +2.0% overall diameter vs selected OEM tire — descriptive only, not a clearance rating.
295/30R20: -0.2% overall diameter vs selected OEM tire — descriptive only, not a clearance rating.
295/35R20: +4.1% overall diameter vs selected OEM tire — descriptive only, not a clearance rating.
315/35R20: +6.1% overall diameter vs selected OEM tire — descriptive only, not a clearance rating.

Documented tire pairings are not tire recommendations.