Fitment guide

Porsche 718 Cayman GT4 RS Wheel & Tire Fitment Guide

Originally published | 05/02/2023
Updated | 03/13/2024

Are you trying to dial in the aesthetic or increase the performance of your mid engined Porsche sports car? Look no further than this 718 Cayman GT4RS wheel and tire fitment guide covering the 2023 GT4RS. Are you looking for fitment info on the GT4? Head over to our 981 Cayman GT4 Wheel and Tire Fitment Guide. We have fitments ranging from Performance street and track to hardcore track to best fit your needs. Unlock the full potential of your 718 GT4RS with options like our Forged VS-5RS and EC-7RS, a great way to maximize sidewall support or increase tire width.

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 408mm Steel and 410mm PCCBs require 20" wheels for proper clearance. Read our article for more info.

Rear Toe Link Clearance

APEX 19x11" rear wheels require the installation of aftermarket motorsport style rear toe links from companies such as Tarett, GMG, SP Motorsports, or BBi to achieve the clearance needed for the reduced wheel diameter. This will also allow you to correct your toe setting when dialing in more negative camber at the rear. APEX 19x10.5" rear wheels do not require this modification.

Available Wheel Designs

Performance Street and Track Wheel Fitment

Wider fitments for enhanced performance

  • White Porsche Cayman - VS-5RS in Anthracite
  • Grey Porsche Cayman - VS-5RS in Motorsport Gold
  • Blue Porsche Cayman - VS-5RS in Motorsport Gold

These are our most popular GT4 RS / Spyder RS fitments perfect for drivers that want an increase in performance over stock without the compromise of having to heavily modify the car. Some modifications may be needed depending on the tires and wheels run. These fitments offer a dual-duty option for those who want to use these wheels on the street and drive to the track for an HPDE. Summer and Extreme Performance tires are what we recommend for these wheel fitments.

Centerlock Wheel

  • Front Wheel Size: 20x9" ET52
  • Rear Wheel Size: 20x11" ET50
    • Available in: VS-5RS
    • Popular fitment


  • APEX Staff Pick:
    • Front Tire Size: 245/35-20
    • Rear Tire Size: 295/30-20
    • Factory GT4RS Tire Sizes
    • Direct Fit
    • Max Performance Summer: Continental Extremecontact Sport 02 (300TW), Michelin PS4S (300 TW)
    • Extreme Performance Summer: Goodyear Supercar 3 (220 TW), Michelin Cup 2 Connect (240TW), Yokohama AD09 (200TW)
    • R-Compound: Michelin Pilot Sport Cup 2 N1 (180 TW), Dunlop Sport Maxx Race 2 N1 (80 TW)
    • Semi-Slick: Hoosier R7 (40TW)- Camber plates required

Hardcore Track Wheel Fitment

Track focused fitments that require significant modifications

  • Silver Porsche Cayman - EC-7RS in Custom Finish
  • Blue Porsche Cayman - EC-7RS in Race Silver

Hardcore track fitment for the GT4 RS and Spyder RS looking to get remove as much understeer as possible from the chassis. Requires modifications to the brakes and some suspension component swaps but provides a noticeable performance improvement.

Centerlock Wheel

  • Front Wheel Size: 19x9.5" ET50
  • Rear Wheel Size: 19x11" ET48
    • Available in: EC-7RS
    • Aftermarket brake required - see below brake clearance


  • Apex Staff Pick:
    • Front Tire Size: 265/35-19
    • Rear Tire Size: 295/30-19
    • Front camber plates required
    • Max Performance Summer: Continental ExtremeContact Sport 02 (300TW), Michelin PS4S (300 TW)
    • Extreme Performance Summer: Nankang CR-S (200TW), Yokohama AD09 (200 TW), Goodyear Supercar 3 (220 TW), Continental ExtremeContact Force (200TW)
    • R-Compound: No options currently available
    • Semi-Slick: Hoosier R7 (40TW)

  • Option 1:
    • Front Tire Size: 265/35-19
    • Rear Tire Size: 305/30-19
    • Front and rear camber plates required
    • Max Performance Summer: Continental ExtremeContact Sport 02 (300TW), Michelin PS4S (300 TW)
    • Extreme Performance Summer: Falken RT660 (200TW), Goodyear Supercar 3 (220 TW)
    • R-Compound: Nankang AR-1 (100TW), Toyo R888R, (100TW), Michelin Cup 2 (180TW), Goodyear Supercar 3R (100TW)
    • Semi-Slick: No options currently available

Additional Resources

Brake Clearance Information

  • Factory Steel 6 piston 408mm - 20x9"ET52 clears
  • Factory PCCB 6 piston 410mm - 20x9"ET52 clears
  • Essex AP Racing Front 13.01.10073 CP9661 6 piston 394mm - 20x9"ET52 and 19x9.5"ET50 clears
  • Essex AP Racing Rear 13.01.10185 CP9450 4 piston 380mm - 20x11"ET50 and 19x11"ET48 clears
  • PFC Sport 0380.0001 front 6 Piston 380mm - 19x9.5"ET50 Clears
  • PFC Sport 0380.0001 rear 4 Piston 380mm - 19x11"ET48 Clears
  • PFC Sport+ 0405.0001 front 6 Piston 405mm - 19x9.5"ET50 Clears
  • PFC Sport+ 0405.0001 rear 4 Piston 380mm - 19x11"ET48 Clears