Porsche 718 Cayman GT4 Wheel & Tire Fitment Guide

Are you trying to dial in the fitment or extract the most performance out of your 718 Cayman GT4? Well, look no further than this Porsche 718 Cayman GT4 Wheel and Tire fitment Guide. We have various fitments from OEM+, Performance street and track, and Hardcore track fitments for those dedicated track cars. If you have a Base, S, GTS, or GTS 4.0 check out our Porsche 718 Cayman Wheel and Tire Fitment Guide to see the fitments relevant to your chassis. Unlock the full potential of your 2020-current 718 GT4 with options like our Forged VS-5RS, EC-7RS, and SM-10RS as well as the Flow Formed SM-10 we have you covered with various levels of performance and weight savings.

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.

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

These bolt-on wheel fitments are ideal for enthusiasts enjoying their GT4/Spyder day-to-day on the street, and they are typically paired with performance-oriented summer tires. These wheel and tire configurations will improve the appearance and performance of the car without requiring modifications to the factory suspension or alignment. Just bolt-on and enjoy!

Wheels

• Front Wheel Size: 20x9" ET50
• Rear Wheel Size: 20x11" ET50
• Available in VS-5RS
• Popular Fitment
• Clears 410mm PCCB

Tires

• APEX Staff Pick:
• Front Tire Size: 245/35-20
• Rear Tire Size: 295/30-20
• Factory GT4 Tire Sizes
• Direct Fit
• Max Performance Summer: Michelin PS4S (300 TW)
• Extreme Performance Summer: Goodyear Supercar 3 (220 TW)
• R-Compound: Michelin Pilot Sport Cup 2 N1 (180 TW), Dunlop Sport Maxx Race 2 N1 (80 TW)

These are our most popular GT4/Spyder fitments perfect for drivers that want an increase in Performance 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.

Wheels

• Front Wheel Size: 19x9" ET50
• Rear Wheel Size: 19x10.5" ET44
• Available in SM-10, VS-5RS, & SM-10RS
• Popular Fitment

Tires

• APEX Staff Pick:
• Front Tire Size: 255/35-19
• Rear Tire Size: 285/35-19
• Direct fit
• Max Performance Summer: Michelin PS4S (300 TW), Continental Extremecontact Sport 02 (340 TW)
• Extreme Performance Summer: Bridgestone RE-71RS (200 TW), Michelin Pilot Sport Cup 2 240 Connect (240 TW), Yokohama AD09 (200TW)
• R-Compound: No options currently available
• Semi-Slick: No options currently available
• Alternative 1: 
• Front Tire Size: 265/35-19
• Rear Tire Size: 285/35-19
• Front camber plates required
• Max Performance Summer: Michelin PS4S (300 TW)
• Extreme Performance Summer: Michelin Pilot Sport Cup 2 240 Connect (240 TW), Goodyear Supercar 3 (220 TW), Yokohama AD09 (200TW)
• R-Compound: Goodyear Supercar 3R (100 TW), Toyo R888R (100 TW)
• Semi-Slick: No options currently available
• Alternative 2: 
• Front Tire Size: 265/35-19
• Rear Tire Size: 295/35-19
• Front camber plates required
• Max Performance Summer: Michelin PS4S (300 TW)
• Extreme Performance Summer: Falken RT660 (200 TW)
• R-compound: Michelin Cup 2 (180 TW)
• Semi-Slick: Hoosier R7 (40 TW)
• Alternative 3: 
• Front Tire Size: 245/40-19
• Rear Tire Size: 285/35-19
• Direct fit
• OEM Heights
• Max Performance Summer: Michelin PS4S (300 TW)
• Extreme Performance Summer: Bridgestone RE-71RS (200 TW), Michelin Pilot Sport Cup 2 240 Connect (240 TW), Goodyear Supercar Eagle 3 (220 TW), Yokohama AD09 (200TW)
• R-Compound: No options currently available
• Semi-Slick: No options currently available
• Alternative 4: 
• Front Tire Size: 255/35-19
• Rear Tire Size: 305/30-19
• Ream camber plates highly suggested
• Max Performance Summer: Michelin PS4S (300 TW)
• Extreme Performance Summer: Michelin Pilot Sport Cup 2 240 Connect (240 TW)
• R-compound: Michelin Cup 2 (180 TW)
• Semi-Slick: No options currently available
• Alternative 5:
• Front Tire Size: 265/35-19
• Rear Tire Size: 305/30-19
• Front Camber plates required
• Rear Camber plates highly suggested
• Max Performance Summer: Michelin PS4S (300 TW)
• Extreme Performance Summer: Michelin Pilot Sport Cup 2 240 Connect (240 TW), Yokohama AD08R (200 TW), Goodyear Supercar 3 (220 TW), Falken RT660 (200 TW)
• R-Compound: Toyo R888R (100 TW), Michelin Pilot Sport Cup 2 (180 TW), Nankang AR-1 (100 TW), Goodyear Supercar 3R (100 TW)
• Semi-Slick: No options currently available

Wheels

• Front Wheel Size: 19x9" ET50 or ET48
• Rear Wheel Size: 19x11" ET45 or ET46 or ET48
• Available in SM-10, EC7RS, VS-5RS, SM-10RS, VS-5RE & SM-10RE
• Popular Fitment
• Aftermarket rear toe links required

Tires

• APEX Staff Pick: 
• Front Tire Size: 265/35-19
• Rear Tire Size: 295/35-19
• Front camber plates required
• Rear wheel and tire may slightly poke beyond the rear fenders with wide tire compounds. To prevent rubbing under compression rear camber plates or fender rolling may be required.
• Max Performance Summer: Michelin PS4S (300 TW)
• Extreme Performance Summer: Falken RT660 (200 TW)
• R-compound: Michelin Cup 2 (180 TW)
• Semi-Slick: Hoosier R7 (40 TW)
• Alternative 1:
• Front Tire Size: 265/35-19
• Rear Tire Size: 305/30-19
• Front camber plates required
• Rear wheel camber plates or fender rolling may be required.
• Max Performance Summer: Michelin PS4S (300 TW)
• Extreme Performance Summer: Michelin Pilot Sport Cup 2 240 Connect (240 TW), Yokohama AD08R (200 TW), Goodyear Supercar 3 (220 TW), Falken RT660 (200 TW)
• R-Compound: Toyo R888R (100 TW), Michelin Pilot Sport Cup 2 (180 TW), Nankang AR-1 (100 TW), Goodyear Supercar 3R (100 TW)
• Semi-Slick: No options currently available
• Alternative 2: 
• Front Tire Size: 255/35-19
• Rear Tire Size: 305/30-19
• Front is a direct fit
• Rear camber plates highly suggested
• Max Performance Summer: Michelin PS4S (300 TW)
• Extreme Performance Summer: Michelin Pilot Sport Cup 2 240 Connect (240 TW), Yokohama AD08R (200 TW)
• R-compound: Michelin Cup 2 (180 TW)
• Semi-Slick: No options currently available
• Alternative 3:
• Front Tire Size: 255/650-19
• Rear Tire Size: 305/690-19
• Front and Rear camber plates required
• Racing Slick: Pirelli P Zero DH

Wheels

• Front Wheel Size: 20x9" ET50
• Rear Wheel Size: 20x11" ET50
• Available in VS-5RS
• Clears 410mm PCCB

Tires

• APEX Staff Pick:
• Front Tire Size: 245/35-20
• Rear Tire Size: 295/30-20
• Factory GT4 Tire Sizes
• Direct Fit
• Max Performance Summer: Michelin PS4S (300 TW), Continental Extremecontact Sport 02 (340TW)
• Extreme Performance Summer: Goodyear Supercar 3 (220 TW)
• R-Compound: Michelin Pilot Sport Cup 2 N1 (180 TW), Dunlop Sport Maxx Race 2 N1 (80 TW), Yokohama AD09 (200TW)
• Semi-Slick: Hoosier R7 (40 TW)

Many GT4 owners are inspired by the GT4 Clubsport and inquire about running an 18" wheel and tire configuration. 18" wheels will reduce rotational mass, decrease running tire costs, and open you up to racing slick compounds only offered in this diameter, however, the standard 6 piston 380mm steel brakes found on the road-going GT4 will not clear an 18" wheel barrel from any wheel manufacturer. 

To overcome this barrier, owners will purchase and install PFC brakes very similar to the brakes found on the Clubsport. The PFC BBK is quite an investment, therefore, many owners have opted to go with factory 997.2 GT3/GT3RS 6 piston 380mm front brakes as a more cost effective solution. The good news is that our 18" EC-7RS, SM-10RS, & VS-5RS forged wheels offer massive brake clearance, and were engineered specifically to clear both the PFC Sport kit (pn 0.380.0001/2 Sport), as well as the factory 997.2 GT3/GT3RS brakes. * They do not clear the PFC Race kit. 

Wheels

• Front Wheel Size: 18x9" ET46
• Rear Wheel Size: 18x10.5" ET44
• Available in EC-7RS, VS-5RS, SM-10RS, VS-5RE & SM-10RE

Tires

• APEX Staff Pick:
• Front Tire Size: 25/64-18
• Rear Tire Size: 27/68-18
• Factory GT4 Clubsport tire sizes
• Camber plates and a minimum of -3º of front camber is recommended
• Racing Slicks: Michelin
• Alternative 1: 
• Front Tire Size: 265-645-18
• Rear Tire Size: 305-680-18
• Camber plates and a minimum of -3º of front camber is recommended
• Racing Slicks: Pirelli DH
• Alternative 2 
• Front Tire Size: 265/35-18
• Rear Tire Size: 295/35-18
• Camber plates and a minimum of -3º of front camber is recommended
• Extreme Performance Summer: Yokohama A052 (200 TW)
• R-compound: No options currently available
• Semi-Slick: No options currently available

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 to clear our wheels.

• Factory Steel 6 piston 380mm - Clears 19" SM-10, EC-7RS, VS-5RS, & SM-10RS
• Factory PCCB 6 piston 410mm - Requires 20" wheels
• AP Racing 13.01.10083 CP9661 6 piston 394mm - Clears 19" SM-10, EC-7RS, VS-5RS, & SM-10RS
• PFC 0380.0001/2 Sport 6 piston 380mm - Clears 18" EC-7RS, VS-5RS, and SM-10RS