Ford Mustang S550 (2015-2023) Wheel Fitment Guide
The S550 Ford Mustang uses a 5×114.3 bolt pattern, a 70.5mm center bore and M14×1.5 lug nuts with a 60° conical seat, with factory offsets from ET24 to ET52.5 depending on trim. This guide covers US 2015–2023 V6, EcoBoost, GT, Bullitt and Mach 1 models, Brembo clearance on 18-inch wheels and wide 11-inch fronts.
About this guide: Fitment data is compiled from owner builds on Mustang6G and customer cars in wheel-maker fitment galleries, cross-checked against vendor fitment documentation. Use it as research for your build; ride height, tires, and alignment are still your installer's call.
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OEM Setups
Factory Wheel & Tire Configurations
Every S550 in this guide shares the hub hardware below. Base cars run square 17- to 20-inch wheels, while the GT Performance Pack, PP2, Bullitt and Mach 1 come on staggered 19s. On 19-inch aftermarket cards, every "mm out" figure is measured against the GT Performance Pack wheel, 19×9 ET45 front and 19×9.5 ET52.5 rear; 18- and 20-inch cards use the matching factory wheel.
Ford Mustang S550 Hub & Hardware Specs
All trims — 2024-2027
Bolt Pattern5×114.3
Center Bore70.5mm
Fastener TypeLug Nuts
Thread PitchM14×1.5
Seat Type60° conical
Torque Spec150 lb-ft (204 Nm)
Factory OffsetET37.5 to ET45 on square V6, EcoBoost and GT wheels · ET45 / ET52.5 GT Performance Pack and Bullitt · ET40 / ET52.5 Mach 1 · ET24 / ET48 Performance Pack Level 2 · ET24 / ET52.5 Mach 1 Handling Package
Brake SystemGT 352mm 4-piston front · Brembo 6-piston on 380mm rotors with the GT Performance Pack, PP2, Bullitt and Mach 1 · 4-piston front on the EcoBoost Performance Pack and High Performance Package
17″ Base Wheel
Standard · base V6 & EcoBoost
Front Wheel7.5J×17 ET37.5
Rear Wheel7.5J×17 ET37.5
Front Tire235/55R17
Rear Tire235/55R17
ConstructionCast Aluminum
Applies ToV6 MY2015–2017 · base EcoBoost MY2015–2023
The base S550 wheel on V6 and entry EcoBoost cars, on 235/55R17 all-season tires. Catalogs list it at ET37.5, which some charts round to ET37. It suits the standard brakes only, and the GT, Performance Pack and Mach 1 never used it, so it isn't a reference wheel for any card below.
18″ Standard Wheel
Standard · GT & EcoBoost Premium
Front Wheel8J×18 ET40
Rear Wheel8J×18 ET40
Front Tire235/50R18
Rear Tire235/50R18
ConstructionCast Aluminum
Applies ToStandard on GT and EcoBoost Premium, optional on base cars, MY2015–2023 (equipment varies by year)
Several 18×8 styles share this size and offset across the generation, on 235/50R18 tires. It clears the GT's standard 4-piston brakes but not the factory 6-piston Brembos. This is the reference wheel for the 18-inch aftermarket cards below, so their "mm out" figures read against an 8-inch wheel.
19″ Bullitt
Standard · Bullitt
Front Wheel9J×19 ET45
Rear Wheel9.5J×19 ET52.5
Front Tire255/40R19
Rear Tire275/40R19
ConstructionCast Aluminum
Applies ToBullitt MY2019–2020
The Bullitt's five-spoke wheel uses the same sizes and offsets as the GT Performance Pack wheel, 19×9 ET45 front and 19×9.5 ET52.5 rear, on 255/40R19 and 275/40R19 tires. A Bullitt owner documents the offsets and Ford's ordering guide confirms the widths. It clears the Bullitt's Brembo brakes.
19″ Mach 1
Standard · Mach 1
Front Wheel9.5J×19 ET40
Rear Wheel10J×19 ET52.5
Front Tire255/40R19
Rear Tire275/40R19
ConstructionCast Aluminum
Applies ToMach 1 & Mach 1 Premium without Handling Package MY2021–2023
Standard on every Mach 1 without the Handling Package, on 255/40R19 front and 275/40R19 rear tires. Ford Performance sells the same design for other S550s at 19×9.5 ET40 / 19×10 ET52.5. The front sits about 6mm outside the GT Performance Pack front, and it clears the Mach 1's Brembos.
19″ 8.5J Wheels
Optional · EcoBoost & GT
Front Wheel8.5J×19 ET42.5
Rear Wheel8.5J×19 ET42.5
Front Tire255/40R19
Rear Tire255/40R19
ConstructionCast Aluminum
Applies ToOptional on V6, EcoBoost and GT, including Premium appearance packages, MY2015–2023
Several 19×8.5 styles share one size and offset, including Pony, Black Accent and California Special designs. Catalogs list them at ET42.5 on 255/40R19 tires all around. Because the size repeats across many castings, check the stamp on your wheel before using it as a reference for an order.
19″ EcoBoost Performance Pack
Optional · EcoBoost PP & HPP
Front Wheel9J×19 ET45
Rear Wheel9J×19 ET45
Front Tire255/40R19
Rear Tire255/40R19
ConstructionCast Aluminum
Applies ToEcoBoost Performance Pack MY2015–2019 · EcoBoost High Performance Package MY2020–2023
The EcoBoost performance packages run a square 19×9 ET45 wheel, the same front as the GT Performance Pack, on 255/40R19 tires all around. A forged version in the same size was offered separately. It clears the EcoBoost package's 4-piston front brakes.
19″ EcoBoost Handling Package
Optional · EcoBoost HPP Handling
Front Wheel9.5J×19 ET40
Rear Wheel9.5J×19 ET40
Front Tire265/40R19
Rear Tire265/40R19
ConstructionAluminum
Applies ToEcoBoost High Performance Package with Handling Package MY2020–2023
The Handling Package swaps the HPP's 19×9 wheels for a square 19×9.5, on 265/40R19 Pirelli P Zero Corsa 4 summer tires. An owner who removed the factory wheels found them stamped ET40 on all four corners, with no front or rear difference. That position sits about 11mm outside the GT Performance Pack front.
19″ GT Performance Pack
Optional · GT Performance Pack
Front Wheel9J×19 ET45
Rear Wheel9.5J×19 ET52.5
Front Tire255/40R19
Rear Tire275/40R19
ConstructionCast Aluminum
Applies ToGT & GT Premium with Performance Package (Level 1) MY2015–2023
The Performance Pack wheel comes in several finishes, with a forged option on some years, all at 19×9 ET45 front and 19×9.5 ET52.5 rear, the offsets Ford Service confirmed for 2015. It clears the 6-piston Brembos. This is the reference wheel for every 19-inch aftermarket card below.
19″ Performance Pack Level 2
Optional · GT PP2
Front Wheel10.5J×19 ET24
Rear Wheel11J×19 ET48
Front Tire305/30R19
Rear Tire305/30R19
ConstructionAluminum
Applies ToGT & GT Premium with Performance Package Level 2 MY2018–2020
PP2 adds wider wheels on 305/30R19 tires all around, a 19×10.5 ET24 front and a 19×11 ET48 rear, matching Ford Performance's PP2-style wheel kit. Ford warns those wide sizes can create body or chassis clearance issues on cars without PP2, so treat the front as a PP2 or Mach 1 Handling Package fitment.
19″ Mach 1 Handling Package
Optional · Mach 1 Handling
Front Wheel10.5J×19 ET24
Rear Wheel11J×19 ET52.5
Front Tire305/30R19
Rear Tire315/30R19
ConstructionAluminum
Applies ToMach 1 & Mach 1 Premium with Handling Package MY2021–2023
The Handling Package brings a 19×10.5 ET24 front and a 19×11 rear on 305/30R19 and 315/30R19 tires. Measured prototype wheels and a parts retailer give the rear as ET52.5, while one retail listing says ET48, the PP2 rear. Check the stamp on your rear wheel before ordering against it.
20″ Optional Wheel
Optional · Premium trims
Front Wheel9J×20 ET42.5
Rear Wheel9J×20 ET42.5
Front Tire265/35R20
Rear Tire265/35R20
ConstructionCast Aluminum
Applies ToOptional on EcoBoost Premium and GT Premium (availability varies by year)
The factory 20-inch wheel runs square 9-inch widths on 265/35R20 tires. Catalogs list it at ET42.5, and some round it to ET42. It is the reference wheel for the 20-inch aftermarket cards below; being square, staggered 20-inch rears read larger than their fronts.
Aftermarket Options
Aftermarket Wheel & Tire Configurations
Each card below is one aftermarket wheel size, and each row on its ladder is one documented build at its effective offset, named by the car it was run on. The Front and Rear figures show how far that build's outer lip sits outside the factory wheel named at the top of the ladder.
| Setup | Tires (front · rear) | Stance | Fit | Drivetrain | Sources |
|---|---|---|---|---|---|
| Square — same size all four corners | |||||
| 19×10 ★ET28–40 / ET35–40 | Varies by build | ●●●●● | Bolt-on · Lowered · Mods may be needed | RWD only | 24 |
| 19×9.5ET22–38 | Varies by build | ●●●●● | Bolt-on · Lowered | RWD only | 6 |
| 18×9.5ET35 | Varies by build | ●●●●● | Bolt-on · Track build | RWD only | 3 |
| 20×10ET25–35 | 285/35R20 · 285/35R20 | ●●●●● | Bolt-on | RWD only | 2 |
| 18×10ET15–40 / ET40 | Varies by build | ●●●●● | Bolt-on · Lowered · Track build · Mods may be needed | RWD only | 13 |
| 20×10.5ET30 / ET30–36 | Varies by build | ●●●●● | Lowered | RWD only | 2 |
| 19×11ET26–27 / ET52 | Varies by build | ●●●●● | Lowered · Track build · Mods may be needed | RWD only | 17 |
| 18×11ET27 / ET52 | Varies by build | ●●●●● | Track build · Mods may be needed | RWD only | 10 |
| 18×12ET22 / ET54–57 | 315/30R18 · 315/30R18 | ●●●●● | Track build · Mods may be needed | RWD only | 2 |
| Staggered — wider rear | |||||
| 20×9 / 20×10.5ET22–35 / ET35–45 | Varies by build | ●●●●● | Bolt-on · Lowered | RWD only | 6 |
| 20×9 / 20×10ET20–35 / ET38–40 | Varies by build | ●●●●● | Bolt-on · Lowered | RWD only | 3 |
| 19×9.5 / 19×10.5ET20–35 / ET43–45 | Varies by build | ●●●●● | Bolt-on · Lowered | RWD only | 2 |
| 19×10 / 19×11ET35–40 / ET50–52 | Varies by build | ●●●●● | Bolt-on · Lowered · Not reported | RWD only | 11 |
| 20×10 / 20×11ET25–35 / ET35–52 | Varies by build | ●●●●● | Bolt-on · Lowered · Not reported | RWD only | 5 |
| 20×9.5 / 20×10.5ET10–25 / ET38–45 | Varies by build | ●●●●● | Bolt-on · Lowered | RWD only | 3 |
| 19×10.5 / 19×11ET24–30 / ET48–62 | 295/35R19 · 305/35R19 | ●●●●● | Bolt-on · Lowered · May rub | RWD only | 3 |
| 19×11 / 19×11.5ET26 / ET56 | 305/30R19 · 325/30R19 | ●●●●● | Track build · Mods may be needed | RWD only | 2 |
Tap a setup to jump to its full card. Fit: Bolt-on = documented at stock ride height with no fender work reported · Lowered = documented on lowering springs or coilovers · Not reported = owners didn't say. Sources = owner builds (including customer cars in vendor galleries) and vendor fitment-guide setups documented on that card.
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Platform-specific fitment notes — Ford Mustang S550
Brembo brakes and 18-inch wheels.
The GT Performance Pack, PP2, Bullitt and Mach 1 use Brembo 6-piston front calipers on 380mm rotors and came on 19-inch wheels. Most 18-inch cards here are documented on GTs with base brakes; some track wheels clear the Brembos, but spoke and barrel shape decide it. Tell us your brake package when you order.
Wide fronts and the inner strut.
Fronts wider than 10 inches are documented with low offsets around ET24 to ET30, or 25mm spacers to the same position, plus extra negative camber. Owners report 295 tires on 10-inch fronts touching at full steering lock, and vendor documentation notes 285s can touch the strut on some cars.
Lug nuts and hub fit.
FMB machines S550 wheels for 60° conical lug nuts, matching the factory nuts, and bores them to the 70.5mm hub, so no hub rings are needed. Spacer builds below are listed at their effective offset; having that offset machined into the wheel avoids spacers and the longer studs 25mm spacers need.
Square Setup
Most Popular
Stance range
flush → poke
OEM
Aggressive
Wheels (All 4)
19×10 (Front and Rear)
Documented ET28 – ET40 front · ET35 – ET40 rear
Documented offsets
Lip position vs. stock · F 9J ET45 · R 9.5J ET52.5
ET40
Front18mm outRear19mm out
ET35
Front23mm outRear24mm out
ET28 / ET40
Front30mm outRear19mm out
Sources
Well-documented
23 community
1 vendor
The most documented S550 size by a wide margin: a 10-inch square on 275/40R19 or 285/35R19 all around, run on GTs, Mach 1s and EcoBoosts. ET40 and ET35 are both reported at stock height with no rubbing or spacers. If your car is at stock height, start from either of the top two rows.
Stance range
flush → poke
OEM
Aggressive
Wheels (All 4)
19×9.5 (Front and Rear)
Documented ET22 – ET38
Documented offsets
Lip position vs. stock · F 9J ET45 · R 9.5J ET52.5
ET38
Front13mm outRear15mm out
ET35
Front16mm outRear18mm out
ET22
Front29mm outRear31mm out
Sources
Well-documented
6 community
Close to the factory EcoBoost Handling Package wheel, 19×9.5 ET40, so the top row is a near-factory fit. Owners report ET38 and ET35 at stock height with no rubbing. The ET22 row sits about 29mm out at the front, on two EcoBoosts and a GT running 255 tires, two of them lowered.
Stance
flush → poke
OEM
Aggressive
Wheels (All 4)
18×9.5 ET35 (Front and Rear)
Documented build
Lip position vs. stock · F 18″ 8J ET40 · R 18″ 8J ET40
ET35
Front24mm outRear24mm out
Sources
Well-documented
2 community
1 vendor
A milder 18-inch square for base-brake cars, about 24mm out against the factory 18-inch wheel. One GT runs it at stock height on 255/45R18 all-season tires; the other is a road-race car on 275/35R18. A vendor fitment guide lists the same spec as a bolt-on with 275/40R18 tires.
Stance range
flush → poke
OEM
Aggressive
Wheels (All 4)
20×10 (Front and Rear)
Documented ET25 – ET35
Tires
285/35R20 (All 4)
Documented offsets
Lip position vs. stock · F 20″ 9J ET42.5 · R 20″ 9J ET42.5
ET35
Front20mm outRear20mm out
ET25
Front30mm outRear30mm out
Sources
Documented
2 community
A 20-inch square on 285/35R20 all around, documented on two GTs at stock height. The ET35 car reports no changes; the other runs ET35 wheels on 10mm spacers at all four corners, listed here at the effective ET25, with no rubbing or trimming. Against the factory 20-inch wheel the fronts sit about 20–30mm out.
Stance range
flush → poke
OEM
Aggressive
Wheels (All 4)
18×10 (Front and Rear)
Documented ET15 – ET40 front · ET40 rear
Documented offsets
Lip position vs. stock · F 18″ 8J ET40 · R 18″ 8J ET40
ET40
Front25mm outRear25mm out
ET37 / ET40
Front28mm outRear25mm out
ET28 / ET40
Front37mm outRear25mm out
ET25 / ET40
Front40mm outRear25mm out
ET15 / ET40
Front50mm outRear25mm out
Sources
Well-documented
12 community
1 vendor
An 18-inch track square for cars with factory base brakes, on 265 to 305 tires. ET40 is listed as needing no modifications on 265 to 285 tires; owners stepping up to 295 or 305 tires add front spacers, listed here at the effective offset. Brembo cars need a caliper check before choosing 18s.
Stance
flush → poke
OEM
Aggressive
Wheels (All 4)
20×10.5 (Front and Rear)
Documented ET30 front · ET30 – ET36 rear
Documented offsets
Lip position vs. stock · F 20″ 9J ET42.5 · R 20″ 9J ET42.5
ET30 / ET36
Front32mm outRear26mm out
ET30
Front32mm outRear32mm out
Sources
Documented
2 community
An aggressive 20-inch square, about 32mm out at the front against the factory 20-inch wheel, documented on a GT and an EcoBoost on lowering springs. Both report no rubbing or trimming, and the EcoBoost owner describes the look as poke. Treat it as a show setup and plan tire choice carefully.
Stance
flush → poke
OEM
Aggressive
Wheels (All 4)
19×11 (Front and Rear)
Documented ET26 – ET27 front · ET52 rear
Documented offsets
Lip position vs. stock · F 9J ET45 · R 9.5J ET52.5
ET27 / ET52
Front43mm outRear20mm out
ET26 / ET52
Front44mm outRear20mm out
Sources
Strongly documented
15 community
2 vendor
The S550 19-inch track square on 305/30R19 tires, common on GTs and Mach 1s. One group runs ET52 wheels on 25mm front spacers, listed at the effective ET27; the other has the ET26 front offset built in, with no spacers. Both sit about 43–44mm out at the front and need extra front camber.
Stance
flush → poke
OEM
Aggressive
Wheels (All 4)
18×11 (Front and Rear)
ET27 front · ET52 rear
Documented build
Lip position vs. stock · F 18″ 8J ET40 · R 18″ 8J ET40
ET27 / ET52
Front51mm outRear26mm out
Sources
Well-documented
9 community
1 vendor
The 18-inch track square on 305 or 315 tires, documented on eight GTs and a Mach 1. Every build runs ET52 wheels on 25mm front spacers with longer studs, listed here at the effective ET27 front, and vendor documentation calls for extra front negative camber. Expect a track alignment rather than a street setup.
Stance
flush → poke
OEM
Aggressive
Wheels (All 4)
18×12 (Front and Rear)
Documented ET22 front · ET54 – ET57 rear
Tires
315/30R18 (All 4)
Documented offsets
Lip position vs. stock · F 18″ 8J ET40 · R 18″ 8J ET40
ET22 / ET57
Front69mm outRear34mm out
ET22 / ET54
Front69mm outRear37mm out
Sources
Well-documented
1 community
1 vendor
The widest track square documented here, a 12-inch wheel on 315/30R18 tires. The GT build runs ET57 wheels on 35mm front and 3mm rear spacers and is listed as needing extensive modifications, including race camber. Vendor documentation adds race-length wheel studs. It suits dedicated track cars only.
Staggered Setup
Stance range
flush → poke
OEM
Aggressive
Front Wheels
20×9
Documented ET22 – ET35
Rear Wheels
20×10.5
Documented ET35 – ET45
Documented offsets
Lip position vs. stock · F 20″ 9J ET42.5 · R 20″ 9J ET42.5
ET35 / ET45
Front8mm outRear17mm out
ET35 / ET40
Front8mm outRear22mm out
ET35 / ET35
Front8mm outRear27mm out
ET32 / ET45
Front11mm outRear17mm out
ET22 / ET38
Front21mm outRear24mm out
Sources
Well-documented
6 community
The most documented 20-inch S550 stagger, on 245 to 275 fronts and 275 to 305 rears. Three GTs run ET35 fronts at stock height with no rubbing. The ET32 / ET45 row is two 2015 GTs on lowering springs, and the ET22 / ET38 row pushes the front about 21mm out against the factory 20-inch wheel.
Stance range
flush → poke
OEM
Aggressive
Front Wheels
20×9
Documented ET20 – ET35
Rear Wheels
20×10
Documented ET38 – ET40
Documented offsets
Lip position vs. stock · F 20″ 9J ET42.5 · R 20″ 9J ET42.5
ET35 / ET38
Front8mm outRear17mm out
ET20 / ET40
Front23mm outRear15mm out
Sources
Documented
3 community
A close-to-stock 20-inch stagger at ET35 / ET38, documented on a GT and an EcoBoost, with the fronts about 8mm out against the factory 20-inch wheel. The GT runs it at stock height on 305/30R20 rears. The ET20 / ET40 row is an air-suspension car, about 23mm out at the front.
Stance range
flush → poke
OEM
Aggressive
Front Wheels
19×9.5
Documented ET20 – ET35
Rear Wheels
19×10.5
Documented ET43 – ET45
Documented offsets
Lip position vs. stock · F 9J ET45 · R 9.5J ET52.5
ET35 / ET45
Front16mm outRear20mm out
ET20 / ET43
Front31mm outRear22mm out
Sources
Documented
2 community
A 19-inch stagger that stays close to the factory Performance Pack look. The ET35 / ET45 row is a 2021 GT at stock height on 245/40R19 / 285/35R19 all-season tires. The ET20 / ET43 row sits about 31mm out at the front on lowering springs, with 265/35R19 / 305/35R19 tires and no rubbing reported.
Stance
flush → poke
OEM
Aggressive
Front Wheels
19×10
Documented ET35 – ET40
Rear Wheels
19×11
Documented ET50 – ET52
Documented offsets
Lip position vs. stock · F 9J ET45 · R 9.5J ET52.5
ET40 / ET52
Front18mm outRear20mm out
ET35 / ET50
Front23mm outRear22mm out
Sources
Well-documented
10 community
1 vendor
The most documented S550 stagger, on 275/35R19 or 285/35R19 fronts and 305/30R19 to 325/30R19 rears. Most builds run ET40 / ET52 and are listed as needing no modifications. The ET35 / ET50 row adds about 5mm at the front, on an EcoBoost High Performance Package car and a GT.
Stance range
flush → poke
OEM
Aggressive
Front Wheels
20×10
Documented ET25 – ET35
Rear Wheels
20×11
Documented ET35 – ET52
Documented offsets
Lip position vs. stock · F 20″ 9J ET42.5 · R 20″ 9J ET42.5
ET35 / ET52
Front20mm outRear16mm out
ET35 / ET50
Front20mm outRear18mm out
ET35 / ET35
Front20mm outRear33mm out
ET34 / ET52
Front21mm outRear16mm out
ET25 / ET45
Front30mm outRear23mm out
Sources
Well-documented
4 community
1 vendor
The wide 20-inch stagger, on 275 to 285 fronts and 305 to 315 rears. A vendor fitment guide lists ET35 / ET52 as a bolt-on, and owners run ET34 to ET35 fronts with ET50 to ET52 rears. The ET25 / ET45 row is a 2021 GT Premium at stock height, about 30mm out at the front.
Stance range
flush → poke
OEM
Aggressive
Front Wheels
20×9.5
Documented ET10 – ET25
Rear Wheels
20×10.5
Documented ET38 – ET45
Documented offsets
Lip position vs. stock · F 20″ 9J ET42.5 · R 20″ 9J ET42.5
ET25 / ET45
Front24mm outRear17mm out
ET22 / ET38
Front27mm outRear24mm out
ET10 / ET40
Front39mm outRear22mm out
Sources
Documented
3 community
A 9.5-inch front with a 10.5-inch rear, on 265 to 275 fronts and 285 to 305 rears. The ET25 / ET45 row is a 2018 GT at stock height, about 24mm out at the front. The two lower rows are lowered cars, one on a 1-inch front spacer about 39mm out, so treat them as show setups.
Stance range
flush → poke
OEM
Aggressive
Front Wheels
19×10.5
Documented ET24 – ET30
Rear Wheels
19×11
Documented ET48 – ET62
Documented offsets
Lip position vs. stock · F 9J ET45 · R 9.5J ET52.5
ET30 / ET62
Front34mm outRear10mm out
ET30 / ET52
Front34mm outRear20mm out
ET24 / ET48
Front40mm outRear24mm out
Sources
Documented
3 community
The Performance Pack Level 2 size, run here on Performance Pack GTs with 295/35R19 fronts and 305/35R19 rears. Offsets range from the factory PP2 ET24 / ET48 to ET30 fronts. The ET30 / ET62 row is a GT350 wheel set at stock height; the factory PP2 row on a lowered car reports a slight rub at full compression.
Stance
flush → poke
OEM
Aggressive
Front Wheels
19×11 ET26
Rear Wheels
19×11.5 ET56
Documented build
Lip position vs. stock · F 9J ET45 · R 9.5J ET52.5
ET26 / ET56
Front44mm outRear22mm out
Sources
Well-documented
1 community
1 vendor
An 11-inch front with an 11.5-inch rear, close to the GT350R's factory setup, which has its own guide. It is documented on a Mach 1 on 305/30R19 fronts and 325/30R19 rears, listed as needing light modifications. Vendor documentation adds extra camber front and rear; plan a track alignment.
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Our Process
What happens when you build with FMB
Built to the exact spec, not the closest one on a shelf. The setups above come from real S550 Mustang builds, and we CNC-machine every wheel to them directly. If a build needs a spacer to reach its offset, we machine that offset into the wheel instead.
- Choose your setup.
This guide is built to give you what you need to pick a spec with confidence: documented S550 Mustang builds, tire sizes, and how each one fits. If you still have questions, we're happy to help before you order.
- Engineering verification.
Our manufacturing partner confirms wheel specs, including bolt pattern, center bore, brake caliper clearance, backspacing and load rating.
- Render approval.
You approve the design and final specs before we move forward with production.
Our fitment guarantee
Every set is guaranteed to mount on your S550 Mustang: 5×114.3 bolt pattern, bored to the 70.5mm hub, machined for 60° conical lug nuts, and made to the exact width and offset you approved.
How a setup sits on your car also depends on ride height, tires and alignment, so choose with your plans in mind.
Start your S550 Mustang build →Common Questions
FAQ — Frequently Asked Questions
What wheels and tires come stock on the S550 Mustang?
Base cars run 17×7.5 ET37.5, 18×8 ET40, 19×8.5 ET42.5 or 20×9 ET42.5, all square. The GT Performance Pack and Bullitt use 19×9 ET45 / 19×9.5 ET52.5 on 255/40R19 / 275/40R19, the Mach 1 19×9.5 ET40 / 19×10 ET52.5, and PP2 19×10.5 ET24 / 19×11 ET48 on 305/30R19 tires.
What are the S550 bolt pattern, center bore and lug nut torque?
Every S550 in this guide uses a 5×114.3 bolt pattern, a 70.5mm center bore and M14×1.5 lug nuts with a 60° conical seat, torqued to 150 lb-ft (204 Nm). FMB machines wheels for conical-seat lug nuts and bores them to the 70.5mm hub, so hub rings aren't needed. Confirm the torque in your owner's manual.
What aftermarket wheel sizes fit an S550 at stock ride height?
At stock height, owners most often document a square 19×10 at ET35 or ET40 on 275/40R19 or 285/35R19, and a 19×10 ET40 / 19×11 ET52 stagger. On 20s, 20×9 ET35 / 20×10.5 ET45 is documented with no rubbing. Fronts wider than 10 inches usually come with spacers or extra camber.
What's the difference between flush and aggressive fitment, and how do I read the offset ladder?
Each card is one wheel size and each row is one documented build at its effective offset. The Front and Rear figures show how far the outer lip sits outside the factory wheel named at the top of the ladder, the GT Performance Pack wheel on 19-inch cards. Most street builds sit about 8–30mm out at the front; track squares reach about 44–51mm.
Will 18-inch wheels clear the Brembo brakes?
The GT Performance Pack, PP2, Bullitt and Mach 1 came on 19-inch wheels over Brembo 6-piston calipers, so 19 inches is the safe starting point on those cars. Base GTs and EcoBoosts ran 18-inch wheels from the factory. Some 18-inch track wheels clear the Brembos, but it depends on the spoke and barrel shape. Tell us your brakes when you order.
Should I run a square or staggered setup on an S550?
Square setups, most often 19×10 on 275/40R19 or 285/35R19, let you rotate tires and are the most documented S550 setup on street and track. Staggered setups such as 19×10 / 19×11 or 20×9 / 20×10.5 put wider rubber on the driven rear axle. Either way, keep overall diameters close to stock so the speedometer stays accurate.
Should I use wheel spacers?
Owners use 10–15mm front spacers to fit 295 or 305 tires on 10-inch wheels, and 25mm front spacers with longer studs to fit ET52 11-inch wheels up front. Spacer builds appear here at their effective offset, the wheel offset minus the spacer, and FMB machines that offset into the wheel, so no spacer or extended studs are needed.
What are the best winter wheel options?
We didn't find a dedicated factory winter wheel. Base-brake GTs and EcoBoosts can run the factory 18×8 ET40 size, which keeps sidewalls taller and diameters near stock. Brembo-equipped cars should start at 19 inches; a set at the GT Performance Pack sizes, 19×9 ET45 / 19×9.5 ET52.5, keeps clearance the same as stock.
Which model years and models does this guide cover?
US-market S550 Mustang V6 (2015–2017), EcoBoost and EcoBoost Premium, GT and GT Premium, Bullitt (2019–2020) and Mach 1 (2021–2023), fastback and convertible, for model years 2015–2023. That includes the 2018 facelift, the GT Performance Pack, PP2 and the Mach 1 Handling Package. The Shelby GT350, GT350R and GT500 use wider front bodywork and aren't covered.
Do S650 or Shelby GT350 wheels fit the S550?
Usually, yes. The 2024-on S650 and the Shelby GT350 share the 5×114.3 pattern, 70.5mm bore and M14×1.5 lug nuts, and owners report running GT350 wheels on Performance Pack GTs. GT350 offsets were set for wider front fenders, so check front clearance first. The GT350 and S650 each have their own guide.
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