Track Fitment
Track Fitment
Front Setup18x9 ET46245/35-18
Rear Setup18x12 ET63315/30-18
Track Fitment reference setup. Verify tire model, camber, brake clearance, and ride height before ordering.
Porsche 997.1 GT3 / GT3 RS wheel specs and setup guide
Porsche 997.1 GT3 / GT3 RS Fitment Guide
Use this Porsche 997.1 GT3 / GT3 RS fitment guide to compare front and rear wheel specs, tire sizes, hub hardware, and fitment types before choosing a setup.
997.1 GT3 / GT3 RS fitment997.1 GT3 / GT3 RS fitment guidePorsche 997.1 GT3 / GT3 RS wheel fitment997.1 GT3 / GT3 RS wheel specs
Quick answer
What is the best 997.1 GT3 / GT3 RS fitment?
A popular 997.1 GT3 / GT3 RS setup is 18x9 ET46 front with 245/35-18 tires and 18x12 ET63 rear with 315/30-18 tires. Review the full table for the rest of the combinations people have run, then double-check body width, brake clearance, ride height, and hub hardware before ordering.
Wheel specs
997.1 GT3 / GT3 RS Wheel Specs
Start with the factory specs before comparing aftermarket 997.1 GT3 / GT3 RS wheel fitment.
Years2007-2008
Bolt Pattern5x130
Center Bore71.6mm
HardwareM14x1.5
Chassis context
How to Read This 997.1 GT3 / GT3 RS Fitment Guide
This guide covers popular fitment setups for the Porsche 997.1 GT3 / GT3 RS, plus the factory hub specs that matter when shopping for wheels.
Featured setups are shown first, followed by a broader table of combinations people have run. Use those as a starting point, then confirm tire model, suspension height, alignment, brake package, and body clearance on your car before ordering.
Popular setups
Best 997.1 GT3 / GT3 RS Wheel Fitment Setups
These 997.1 GT3 / GT3 RS fitment setups combine the vehicle-specific fitment data with the proven fitment recommendations.
Performance/Street Fitment
Performance/Street Fitment
Front Setup18x9 ET46255/35-18
Rear Setup18x12 ET63315/30-18
Performance/Street Fitment reference setup. Verify tire model, camber, brake clearance, and ride height before ordering.
Fitment type options
Popular 997.1 GT3 / GT3 RS Fitments People Have Run
These setups are organized by fitment type. Front and rear specs are shown together because the setup works as a full pair, even when the fitment is square.
Fitment TypeFrontRear
Track Fitment18x9 ET46245/35-1818x12 ET63315/30-18
Performance/Street Fitment18x9 ET46255/35-1818x12 ET63315/30-18
Aftermarket range
997.1 GT3 / GT3 RS Fitment Range
Common widths9-12 inches across popular setups
Offset rangeET36-ET63 across popular setups
Popular tires235/35-19, 245/35-18, 245/35-19, 255/35-18, 275/35-18, 315/30-18, 315/30-19
Fitment notes
What to Know Before Buying 997.1 GT3 / GT3 RS Wheels
Compare the Full Setup
The 997.1 GT3 / GT3 RS fitment table keeps front and rear specs together so wheel width, offset, and tire size can be reviewed as a complete setup.
Check Clearance Before Ordering
Wheel width, offset, tire model, alignment, brake package, and ride height can all change clearance. Confirm inner suspension clearance, outer fender clearance, hub fit, and brake caliper clearance before ordering.
Factory sizes
997.1 GT3 / GT3 RS OEM Wheel Sizes
SizeOffsetNotes
8.5Jx19 front / 12Jx19 rearET53 front / ET63-68 rear997.1 GT3 representative; 235/35ZR19 front, 305/30ZR19 rear.
9Jx19 front / 12Jx19 rearET47 front / ET48 rearGT3 RS widebody package; 245/35ZR19 front, 325/30ZR19 rear.
Buyer notes
997.1 GT3 / GT3 RS Fitment Tips
- Start with the 997.1 GT3 / GT3 RS factory hub specs: 5x130 bolt pattern, 71.6mm center bore, and M14x1.5 hardware.
- Compare front and rear specs together, especially on staggered setups where tire diameter and offset balance matter.
- Check brake clearance with the exact wheel design, not just diameter and offset.
- Use the wheel fitment calculator to compare poke, inset, and tire changes against your current setup.
FAQ
997.1 GT3 / GT3 RS Fitment Guide Questions
What is the best 997.1 GT3 / GT3 RS fitment?
A popular 997.1 GT3 / GT3 RS setup is 18x9 ET46 front with 245/35-18 tires and 18x12 ET63 rear with 315/30-18 tires. Review the full table for the rest of the combinations people have run, then double-check body width, brake clearance, ride height, and hub hardware before ordering.
What bolt pattern is a Porsche 997.1 GT3 / GT3 RS?
The Porsche 997.1 GT3 / GT3 RS uses a 5x130 bolt pattern with a 71.6mm center bore and M14x1.5 wheel hardware.
Do I need to verify brake clearance on a 997.1 GT3 / GT3 RS?
Yes. Diameter, width, and offset are not enough by themselves because spoke shape and brake package determine caliper clearance.
Find wheels for your 997.1 GT3 / GT3 RS
Browse the marketplace or compare your current setup against a new 997.1 GT3 / GT3 RS fitment.