Corvette C6 Base & Z51 (2005-2013) Wheel Fitment Guide
The narrow-body C6 Corvette coupe and convertible use a 5×4.75 (5×120.65) bolt pattern, a 70.3mm center bore, M12×1.5 60° conical lug nuts and factory 18×8.5 ET56 front / 19×10 ET79 rear wheels. This guide covers US model years 2005–2013, with or without the Z51 package, rear fender clearance and big-brake upgrades.
About this guide: Fitment data is compiled from owner builds on CorvetteForum 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 narrow-body C6 shares the hub hardware below, and every factory wheel style is the same 18×8.5 ET56 front and 19×10 ET79 rear, so every "mm out" figure below is measured against that one position. The widebody Z06, Grand Sport and ZR1 have their own guide.
Corvette C6 Base & Z51 Hub & Hardware Specs
All narrow-body trims — 2005-2013
Bolt Pattern5×4.75 (5×120.65)
Center Bore70.3mm
Fastener TypeLug Nuts
Thread PitchM12×1.5
Seat Type60° conical
Torque Spec100 lb-ft (136 Nm)
Factory OffsetET56 front / ET79 rear (every narrow-body wheel)
Brake SystemBase: 325mm front / 305mm rear rotors · Z51 package: 340mm front / 330mm rear rotors
2011–2013 5-Spoke Wheel
Standard · 2011–2013
Front Wheel18×8.5 ET56
Rear Wheel19×10 ET79
Front Tire245/40ZR18
Rear Tire285/35ZR19
ConstructionCast Aluminum
Applies ToCoupe & Convertible MY2011–2013; Silver (QG6) standard, Competition Gray (QX1) and Chrome (QX3) optional
A new 5-spoke design arrived for 2011 in silver, Competition Gray or chrome, at the same sizes and offsets as every earlier narrow-body wheel. That means the factory wheels from any C6 coupe or convertible year swap directly, and every aftermarket setup below applies to all of them.
5-Split-Spoke Wheel
Standard · 2008–2010
Front Wheel18×8.5 ET56
Rear Wheel19×10 ET79
Front Tire245/40ZR18
Rear Tire285/35ZR19
ConstructionCast Aluminum
Applies ToCoupe & Convertible MY2008–2010, including Z51 cars through 2009; Silver (QG6) or Competition Gray (QX1)
The standard wheel from 2008, a split-spoke design in silver or Competition Gray. Owners describe it as cast. Sizes and offsets are unchanged from the launch wheels, so it shares every aftermarket setup on this page, including the brake-clearance notes for Z51 cars.
Original 5-Spoke Wheel
Standard · 2005–2008
Front Wheel18×8.5 ET56
Rear Wheel19×10 ET79
Front Tire245/40ZR18
Rear Tire285/35ZR19
ConstructionCast Aluminum (painted and chrome)
Applies ToCoupe & Convertible MY2005–early 2008, base and Z51; Silver standard, Competition Gray, polished and chrome (QX3, through 2008) optional
The launch C6 wheel, offered in silver, Competition Gray, polished and chrome. The chrome version stayed on the options list through 2008. The Z51 package used the same wheel sizes and tires as the base car, so there is no separate Z51 wheel position.
5-Spoke Forged Wheel
Optional · 2008–2010
Front Wheel18×8.5 ET56
Rear Wheel19×10 ET79
Front Tire245/40ZR18
Rear Tire285/35ZR19
ConstructionForged Aluminum
Applies ToCoupe & Convertible MY2008–2010; polished (QG7) and chrome (Q9V)
The only forged factory wheel on the narrow-body C6, offered polished from 2008 and in chrome until the chrome version was dropped for 2011. Owners call it the Gumby wheel. Same sizes and offsets as the cast wheels, so it carries the same factory tires and every aftermarket setup below.
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 8.5-inch ET56 front and 10-inch ET79 rear wheels.
| Setup | Tires (front · rear) | Stance | Fit | Drivetrain | Sources |
|---|---|---|---|---|---|
| Square — same size all four corners | |||||
| 18×10ET58 | 275/35R18 · 275/35R18 | ●●●●● | Bolt-on | RWD only | 1 |
| 18×11ET57 / ET57–75 | Varies by build | ●●●●● | Track build · Mods may be needed | RWD only | 6 |
| Staggered — wider rear | |||||
| 18×8.5 / 19×10ET46–55 / ET65–75 | Varies by build | ●●●●● | Not reported | RWD only | 3 |
| 19×8.5 / 20×10ET56 / ET79 | 245/35R19 · 285/30R20 | ●●●●● | Bolt-on | RWD only | 1 |
| 19×9 / 20×11ET50 / ET82 | 265/35R19 · 305/30R20 | ●●●●● | Not reported | RWD only | 1 |
| 18×10 / 19×11ET58 / ET73–78 | Varies by build | ●●●●● | Bolt-on · Mods may be needed | RWD only | 6 |
| 19×9.5 / 20×11ET53 / ET73–79 | 275/35R19 · 305/30R20 | ●●●●● | Not reported | RWD only | 2 |
| 18×10 / 18×11ET58 / ET75 | Varies by build | ●●●●● | Bolt-on | RWD only | 2 |
| 19×9 / 20×10.5ET50 / ET65 | Varies by build | ●●●●● | Not reported | RWD only | 2 |
| 18×9 / 19×10.5ET50 / ET65 | 255/35R18 · 295/30R19 | ●●●●● | Not reported | RWD only | 1 |
| 19×9 / 19×10.5ET50 / ET65 | Not reported | ●●●●● | Not reported | RWD only | 1 |
| 18×9.5 / 19×11ET50 / ET70 | Not reported | ●●●●● | Not reported | RWD only | 1 |
| 18×11 / 19×11ET57 / ET75–78 | 295/30R18 · 305/30R19 | ●●●●● | Track build · Mods may be needed | RWD only | 1 |
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 — Corvette C6 Base & Z51
Rear fender clearance sets the limit.
The narrow-body rear is tight. Owners run 19×10.5 ET65 and 20×11 ET73–82 rears, but the more outboard rows sit about 20mm outside stock and owners describe the ET65 rear as close to the fender. Square 18×11 ET57 setups poke the rear about half an inch past the fender. Widebody wheels don't fit these fenders.
Base, Z51 and upgraded brakes differ.
Base cars use 325mm front rotors and Z51 cars 340mm. Owners who add Z06 brakes report needing a 5mm rear spacer on one 19×11 setup, and one carbon-ceramic swap needed a 19-inch front. Tell us your brake package, and any upgrade, when you order so caliper clearance is checked.
Lug nuts and hub.
Every C6 uses M12×1.5 lug nuts with a 60° conical seat at 100 lb-ft, on a 5×4.75 bolt pattern and a 70.3mm hub. C8 wheels use 5×120 and won't fit. FMB machines every set for 60° conical lug nuts, so your factory nuts or a conical set of the correct length fits.
Square Setup
Stance
flush → poke
OEM
Aggressive
Wheels (All 4)
18×10 ET58 (Front and Rear)
Documented build
Lip position vs. stock · F 18″ 8.5J ET56 · R 19″ 10J ET79
ET58
Front17mm outRear21mm out
Sources
Documented
1 vendor
The mild square option: a 10-inch wheel at every corner on 275/35R18 tires, about 17mm out front and 21mm out rear. Vendor documentation lists it for the factory suspension and alignment. Square setups let you rotate tires but give up some rear tire width compared with the staggered cards.
Stance range
flush → poke
OEM
Aggressive
Wheels (All 4)
18×11 (Front and Rear)
Documented ET57 – ET75
Documented offsets
Lip position vs. stock · F 18″ 8.5J ET56 · R 19″ 10J ET79
ET57 / ET75
Front31mm outRear17mm out
ET57
Front31mm outRear35mm out
Sources
Well-documented
5 community
1 vendor
The narrow-body track setup. At ET57 all around the front moves about 31mm out and the rear about 35mm, so the rear pokes past the fender and every documented car runs heavy negative camber. The vendor's ET75 rear keeps the rear tucked at about 17mm out.
Staggered Setup
Stance range
flush → poke
OEM
Aggressive
Front Wheels
18×8.5
Documented ET46 – ET55
Rear Wheels
19×10
Documented ET65 – ET75
Documented offsets
Lip position vs. stock · F 8.5J ET56 · R 10J ET79
ET55 / ET75
Front1mm outRear4mm out
ET50 / ET75
Front6mm outRear4mm out
ET46 / ET65
Front10mm outRear14mm out
Sources
Documented
3 community
Factory wheel widths and tire sizes at lower offsets. The first two rows sit within a few millimeters of stock; the ET46 / ET65 replica set pushes the front about 10mm out and the rear 14mm. A simple choice if you want to keep your tires.
Stance
flush → poke
OEM
Aggressive
Front Wheels
19×8.5 ET56
Rear Wheels
20×10 ET79
Documented build
Lip position vs. stock · F 8.5J ET56 · R 10J ET79
ET56 / ET79
Front0mm outRear0mm out
Sources
Documented
1 community
The C7 Stingray Z51 wheel sizes, which share the C6's widths and offsets in larger diameters. They sit exactly where the factory wheels do, so this is a diameter change only, on lower-profile 245/35R19 and 285/30R20 tires. Documented on a 2006 coupe on stock suspension.
Stance
flush → poke
OEM
Aggressive
Front Wheels
19×9 ET50
Rear Wheels
20×11 ET82
Documented build
Lip position vs. stock · F 8.5J ET56 · R 10J ET79
ET50 / ET82
Front12mm outRear10mm out
Sources
Documented
1 community
An 11-inch rear at a high ET82, which keeps the rear lip only about 10mm outside stock while fitting a 305 tire. The front sits about 12mm out. Documented on a car running −2.7° front camber, which suggests track use; at stock alignment the front tire may sit closer to the liner.
Stance range
flush → poke
OEM
Aggressive
Front Wheels
18×10
Documented ET58
Rear Wheels
19×11
Documented ET73 – ET78
Documented offsets
Lip position vs. stock · F 8.5J ET56 · R 10J ET79
ET58 / ET78
Front17mm outRear14mm out
ET58 / ET75
Front17mm outRear17mm out
ET58 / ET73
Front17mm outRear19mm out
Sources
Well-documented
5 community
1 vendor
The standard narrow-body upgrade: 1.5 inches wider up front and an inch wider out back, for 275 and 305 tires. The front moves about 17mm out and the rear 14–19mm. If your car is at stock height, start from the top row; the ET73 rear is a big-brake car.
Stance range
flush → poke
OEM
Aggressive
Front Wheels
19×9.5
Documented ET53
Rear Wheels
20×11
Documented ET73 – ET79
Documented offsets
Lip position vs. stock · F 8.5J ET56 · R 10J ET79
ET53 / ET79
Front16mm outRear13mm out
ET53 / ET73
Front16mm outRear19mm out
Sources
Documented
2 community
A wider 19/20 setup for 275 front and 305 rear tires. The front moves about 16mm out; the rear sits 13mm out at ET79 or 19mm at ET73. The higher rear offset leaves more fender room, so start from the ET79 row if you plan to keep stock ride height and want the rear tucked.
Stance
flush → poke
OEM
Aggressive
Front Wheels
18×10 ET58
Rear Wheels
18×11 ET75
Documented build
Lip position vs. stock · F 18″ 8.5J ET56 · R 19″ 10J ET79
ET58 / ET75
Front17mm outRear17mm out
Sources
Documented
2 community
An 18-inch rear in place of the factory 19, for the 305/35R18 R-compound sizes common at track days. Both documented cars run Nitto NT01s, about 17mm out at both ends, and the gallery lists both as fitting without modifications. A good fit for owners who want one tire size class for track days.
Stance
flush → poke
OEM
Aggressive
Front Wheels
19×9 ET50
Rear Wheels
20×10.5 ET65
Documented build
Lip position vs. stock · F 8.5J ET56 · R 10J ET79
ET50 / ET65
Front12mm outRear20mm out
Sources
Documented
2 community
The common 19/20 street setup for the narrow body. About 12mm out front and 20mm out rear, so the rear is close to the fender and owners report keeping to 285 or 295 rear tires. A larger-diameter look on modest tire widths, and the most common 19/20 combination in narrow-body owner threads.
Stance
flush → poke
OEM
Aggressive
Front Wheels
18×9 ET50
Rear Wheels
19×10.5 ET65
Documented build
Lip position vs. stock · F 8.5J ET56 · R 10J ET79
ET50 / ET65
Front12mm outRear20mm out
Sources
Documented
1 community
The same ET50 / ET65 offsets as the 19/20 card in the factory diameters. About 12mm out front and 20mm out rear. Documented on a base car upgraded to Z06 brakes, which the owner says clear without spacers. The rear sits close to the fender at this offset.
Stance
flush → poke
OEM
Aggressive
Front Wheels
19×9 ET50
Rear Wheels
19×10.5 ET65
Documented build
Lip position vs. stock · F 18″ 8.5J ET56 · R 19″ 10J ET79
ET50 / ET65
Front12mm outRear20mm out
Sources
Documented
1 community
A 19/19 setup at the same offsets, documented on a base car fitted with carbon-ceramic brakes, where the owner needed a 19-inch front to clear the larger calipers. About 12mm out front and 20mm out rear. Tell us your brakes if you've upgraded them.
Stance
flush → poke
OEM
Aggressive
Front Wheels
18×9.5 ET50
Rear Wheels
19×11 ET70
Documented build
Lip position vs. stock · F 8.5J ET56 · R 10J ET79
ET50 / ET70
Front19mm outRear22mm out
Sources
Documented
1 community
One of the more outboard narrow-body street setups: about 19mm out front and 22mm out rear. One owner build in the thread; the rear at ET70 is close to where owners report the fenders running out of room, so tire width and ride height matter more here than on the cards above.
Stance range
flush → poke
OEM
Aggressive
Front Wheels
18×11
Documented ET57
Rear Wheels
19×11
Documented ET75 – ET78
Documented offsets
Lip position vs. stock · F 8.5J ET56 · R 10J ET79
ET57 / ET78
Front31mm outRear14mm out
ET57 / ET75
Front31mm outRear17mm out
Sources
Documented
1 vendor
An 11-inch front for a 295 tire on the factory rear diameter, listed by a vendor for hardcore track use. The front moves about 31mm out, so at least −2° of front camber is required; the rear sits 14–17mm out.
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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 narrow-body C6 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 narrow-body C6 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 C6 Corvette: 5×4.75 bolt pattern, bored to the 70.3mm 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 C6 Corvette build →Common Questions
FAQ — Frequently Asked Questions
What are the factory wheel and tire sizes on the C6 base and Z51?
Every narrow-body C6 coupe and convertible from 2005–2013 uses 18×8.5 ET56 front and 19×10 ET79 rear wheels on 245/40ZR18 and 285/35ZR19 tires. The Z51 package used the same wheel and tire sizes, and every factory wheel style, painted, chrome or forged, shares those offsets, so any factory C6 coupe or convertible wheel swaps directly.
What are the bolt pattern, center bore, lug nut and torque specs?
The C6 uses a 5×4.75 (5×120.65) bolt pattern, a 70.3mm center bore and M12×1.5 lug nuts with a 60° conical seat, torqued to 100 lb-ft (136 Nm) on clean, dry threads. The C8 moved to 5×120 and a 66.9mm bore, so C8 wheels don't carry over. FMB machines every set for 60° conical lug nuts.
What aftermarket wheel sizes fit at stock ride height?
Vendor documentation lists 18×10 ET58 / 19×11 ET75–78 as a direct upgrade at stock height, and owner builds back it up, including a completely stock 2008 base car on 275/35R18 / 305/30R19 tires. It moves the front lip about 17mm out and the rear 14–17mm. Factory-width wheels at slightly lower offsets sit within a few millimeters of stock.
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, named by the car it was run on. The Front and Rear figures show how far the outer lip sits outside the factory 8.5-inch ET56 front and 10-inch ET79 rear. Street setups move about 10–22mm; square 18×11 track setups at 31–35mm out are the aggressive end.
Will aftermarket wheels clear Z51 or Z06 brakes?
Z51 cars use 340mm front rotors against the base car's 325mm, and the setups here are documented on both. Owners adding Z06 brakes report one 19×11 rear needing a 5mm spacer, while another set at ET50 / ET65 cleared without spacers. Clearance depends on spoke shape, so tell us your brakes and our manufacturing partner checks it.
Can I run a square setup on a narrow-body C6?
Yes. Vendor documentation lists 18×10 ET58 all around on stock suspension, and five owner cars run 18×11 ET57 all around for track use with −1.7° to −3.2° front camber. At ET57 the 11-inch rear pokes past the fender, so the vendor also lists a higher ET75 rear. Staggered setups remain the common street choice.
Should I use wheel spacers?
Rarely on the narrow body, because rear clearance is already tight. One car runs a 5mm rear spacer to clear Z06 rear calipers on 19×11 wheels. Spacer setups appear at their effective offset, and FMB machines that offset into the wheel, so no spacer is needed.
What are the best winter wheel options?
We didn't find a dedicated factory winter wheel for these cars. Owners use the factory 18/19 wheels for cold-weather tires because they keep factory clearances, and every factory style from any C6 coupe or convertible year swaps directly. If you've upgraded brakes, check caliper clearance before ordering a winter set.
Which cars and model years does this guide cover, and how do I tell base, Z51 and Grand Sport apart?
US-market C6 coupes and convertibles from MY2005–2013 with the narrow body, with or without the Z51 package, which was offered through 2009. The 2010–2013 Grand Sport shares the base car's LS3 engine but uses the widebody fenders and wheels, so check for the wider rear fenders and the window sticker.
Do C7 or widebody C6 wheels fit a narrow-body C6?
C7 Stingray wheels share the 5×4.75 pattern, 70.3mm bore and the same 8.5-inch ET56 / 10-inch ET79 sizes, so they sit in the factory position; one 2006 coupe runs C7 Z51-size 19/20 wheels. Z06, Grand Sport and ZR1 wheels bolt on but sit about 29mm out front and 45mm out rear, past these fenders. See the C6 Z06, Grand Sport and ZR1 guide.
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