991 911 GT3 Wheel & Tire Fitment Guide

  • Updated

For 2014-2019 Porsche 991 911 GT3 Widebody

Vehicle Covered in this Guide
2014-2016 991.1 and 2018-2019 991.2 Porsche GT3

Brake Clearance Information

In the engineering phase of wheel development we 3D scan factory brakes and review 2D aftermarket brake templates in order to optimize our barrel profiles and spoke curvatures. As a result, our wheels offer massive brake clearance so you can run the smallest possible wheel diameter.

* The factory 6 piston 410mm PCCBs require 20" wheels for proper clearance. Read our article for more info.

Rear Lower Control Arm Bolt Modification - Required for 19" Wheels

If you have steel brakes, downsizing to a 19" wheel and tire package is advantageous for many reasons including a reduction in weight and an increase in tire options. By decreasing the diameter of the wheels, the inner barrel of the rear wheels get quite close to the factory lower control arm "stabilizer bolt".  To improve clearance, we recommend replacing the stock hex head bolts with Porsche 72mm pan head bolts - part # 999-073-530-01 which are under $10. 

Rear Axle Steering (RAS) Clearance

All 19" and 20" APEX wheels are optimized to clear rear axle steering.

 

Available Wheel Designs (click images to enlarge)

Forged Designs   

VS-5RS

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EC-7RS

EC7RS1811ET7-5120-671_C_Brushed_2K_01-500.png

Order Here

  

 

Performance Street & Track

Wider fitments for enhanced performance

Wheels 

  • Front: 19x9.5" ET50 // Rear: 19x12" ET46
    • Available in: EC-7RS, & VS-5RS
    • Popular Fitment

Tires

  • APEX Staff Pick: Front: 265/35-19 // Rear: 325/30-19
    • Typically a direct fit, but we encourage a minimum of -2º camber up front
    • Max Performance Summer: Michelin PS4S (300 TW)
    • Extreme Performance Summer: Goodyear Eagle Supercar 3 (220 TW), Continental Extremecontact Force (220 TW)
    • R-Compound: Nankang AR-1 (100 TW), Michelin Cup 2 (180 TW), Toyo R888R (100 TW)
    • Semi-Slick: Hoosier R7 & A7(40 TW)

 

Wheels

  • Front: 20x9" ET47 // Rear: 20x12" ET47
    • Available in: VS-5RS
    • Popular Fitment 

Tires

  • APEX Staff Pick: Front: 245/35-20 // Rear: 305/30-20
    • Direct Fit
    • Factory GT3 Tire Sizes
    • Max Performance Summer: Michelin PSS (300 TW)
    • Extreme Performance Summer: Nankang CR-S (200 TW), Michelin PS Cup 2 240 Connect (240 TW)
    • R-Compounds: Michelin PS Cup 2 (180 TW), Michelin PS Cup 2 R (140 TW), Pirelli Trofeo R (60 TW), Dunlop Sport Maxx Race 2 (80 TW)
    • Semi-Slick: Hoosier R7 (40 TW)
  • Alternative 1: Front: 255/35-20 // Rear: 315/30-20
    • Direct Fit
    • Max Performance Summer: Michelin PSS (300 TW)
    • Extreme Performance Summer: Michelin PS Cup 2 240 Connect (240 TW)
    • R-Compounds: Michelin PS Cup 2 (180 TW), Michelin PS Cup 2 R (140 TW) (60 TW), Toyo R888R (100TW)
    • Semi-Slick: No options currently available
  • Alternative 2: Front: 265/35-20 // Rear: 325/30-20
    • Typically a direct fit, but these tires are a touch taller front and rear in comparison to stock. 
    • Max Performance Summer: No options currently available
    • Extreme Performance Summer: No options currently available
    • R-Compounds: Michelin PS Cup 2 (180 TW)
    • Semi-Slick: No options currently available

 

Additional Resources

Brake Clearance Information

In the engineering phase of wheel development we 3D scan factory brakes and review 2D aftermarket brake templates in order to optimize our barrel profiles and spoke curvatures. As a result, our wheels offer massive brake clearance so you can run the smallest possible wheel diameter. The following brakes have been tested and confirmed:

  • Porsche Steel 6 piston 380x34mm f. / 4 piston 380x30mm r. - 19" & 20" wheels clear
  • Porsche PCCB 6 piston 410x34mm f. / 4 piston 390x30mm r. - 20" wheels required, read our article for more info.
  • AP Racing by Essex CP9661 Front 6 piston 394x34mm - 13.01.10073 - 19" & 20" wheels clear
  • AP Racing by Essex CP9449 Rear 4 piston 380x32mm - 13.01.10074 - 19" & 20" wheels clear

Should I Dial in Negative Camber, and How Much is Right for me? 

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Whether you are a casual weekend track warrior that still enjoys your car on the street, or a hardcore racer competing for a spot on the podium, negative camber is a vital part of chassis setup that has many benefits. Not only will adding negative camber create more room for wider wheel and tire configurations (when dialed in through the top hat / camber plate), it more importantly improves handling, turn-in and tire longevity. Learn more in our blog article, The Positives of Negative Camber.

 

Still have questions?
Fill out our Fitment Recommendation form
Call us: 925-245-0773
Email us: support@apexraceparts.com

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