718 Cayman/Boxster Wheel & Tire Fitment Guide

  • Updated

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Vehicle Covered in this Guide
All 2017+ Porsche Cayman and Boxster chassis including the GT4 & Spyder.

 

* Please note, the 718 GT4 and Spyder require a minimum of a 19" wheel due to large brake specifications and rear suspension geometry that limits clearance. See the GT4/Spyder specific section at the bottom of the guide.

 

Bolt Pattern Thread Pitch Center Bore
5x130mm M14x1.5mm 71.6mm

 

OEM+ Fitments

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These 18" and 19" OEM+ fitments were developed specifically for the 718 Cayman/Boxster platform. They're best suited for drivers predominantly enjoying their car on the street, and/or for light track days and AutoX events. A combination of slightly wider wheel widths and perfected offsets provides enthusiasts with a more aggressive stance, and a meaningful increase in performance over the stock configuration without requiring a bunch of modifications to the car. Whether you want to re-use your stock tires or upgrade to "+1 tire sizing" (245 / 275), these easy to install wheel fitments have you covered. 

 

Wheels - Option 1

  • Front: 18x8.5" ET42 // Rear: 18x10" ET36
    • Popular Fitment

Tires

  • APEX Staff Pick: Front: 245/40-18 // Rear: 275/40-18
    • Availability:
      • Max Performance Summer: Michelin PSS (300 TW), Hankook V12 (320 TW), Continental ExtremeContact Sport (340 TW), Yokohama APEX V601 (280 TW), Kumho Ecsta PS91 (260 TW)
      • Extreme Summer: Yokohama A052 (240 TW), Nankang CR-1 (200 TW), Hankook RS-4 (200 TW), Nitto NT05 (200 TW), Goodyear Supercar 3 (220 TW)
  • Narrower Alternative: Front: 235/45-18 // Rear: 265/45-18
    • Factory Tire Sizes
    • Availability:
      • Max Performance Summer: Bridgestone S-04 PP (280 TW), Pirelli P Zero (220 TW)
      • Extreme Summer: Bridgestone RE-71R (200 TW), Yokohama A052 (200 TW)
  • Wider Alternative 1: Front: 255/35-18 // Rear: 275/35-18 
    • Availability:
      • Max Performance Summer: Michelin PS4S (300 TW), Hankook V12 (320 TW), Continental ExtremeContact Sport (340 TW), Kumho Ecsta PS91 (260 TW), Bridgestone S04 PP (280 TW)
      • Extreme Summer: Bridgestone RE-71R (200 TW), Yokohama A052 (240 TW), Nankang CR-1 (200 TW), Hankook RS-4 (200 TW), Dunlop Direzza ZIII (200 TW), Falken RT660 (200 TW), Nitto NT05 (200 TW)
  • Wider Alternative 2: Front: 255/35-18 // Rear: 285/35-18
    • Availability:
      • Max Performance Summer: Michelin PS4S (300 TW), Hankook V12 (320 TW), Bridgestone S04 PP (280 TW)
      • Extreme Summer: Hankook RS-4 (200 TW), Nitto NT05 (200 TW)

Wheels - Option 2

  • Front: 19x9" ET50 // Rear: 19x10" ET40
    • Popular Fitment

Tires

  • APEX Staff Pick: Front: 255/35-19 // Rear: 285/35-19 
    • Availability: 
      • Max Performance Summer: Michelin PS4S (300 TW), Bridgestone S-04 PP (280 TW), Continental ExtremeContact Sport (340 TW), Hankook V12 EVO2 (320 TW), Yokohama APEX V601 (280 TW)
      • Extreme Summer: Bridgestone RE-71R (200 TW)
  • Narrower Alternative 1: Front: 235/40-19 // Rear: 265/40-19
    • Factory Tire Sizes
    • Availability:
      • Max Performance Summer: Michelin PS4S (300 TW), Bridgestone S-04 PP (280 TW), Continental ExtremeContact Sport (340 TW), Yokohama APEX V601 (280 TW)
      • Extreme Summer: Bridgestone RE-71R (200 TW)
  • Narrower Alternative 2: Front: 245/40-19 // Rear: 285/35-19
    • Availability:
      • Max Performance Summer: Michelin PS4S (300 TW), Bridgestone S-04 PP (280 TW), Continental ExtremeContact Sport (340 TW), Hankook V12 EVO2 (320 TW), Yokohama APEX V601 (280 TW)
      • Extreme Summer: Bridgestone RE-71R (200 TW), Goodyear Supercar 3 (220 TW)

 

Aggressive Street Fitments

 

Wheels - Option 1

  • Front: 18x9" ET46 // Rear: 18x10.5" ET44
    • Popular Fitment

Tires

  • APEX Staff Pick: Front: 245/40-18 // Rear: 275/40-18
    • Typically a direct fit, but we encourage negative camber to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity.
    • Availability: 
      • Max Performance Summer: Michelin PSS (300 TW), Hankook V12 (320 TW), Continental ExtremeContact Sport (340 TW), Yokohama APEX V601 (280 TW), Kumho Ecsta PS91 (260 TW)
      • Extreme Summer: Yokohama A052 (240 TW), Nankang CR-1 (200 TW), Hankook RS-4 (200 TW), Nitto NT05 (200 TW), Goodyear Supercar 3 (220 TW)
  • Wider Alternative 1: Front: 255/35-18 // Rear: 275/35-18
    • Typically a direct fit, but we encourage negative camber to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity. 
    • Availability:
      • Max Performance Summer: Michelin PS4S (300 TW), Hankook V12 (320 TW), Continental ExtremeContact Sport (340 TW), Kumho Ecsta PS91 (260 TW), Bridgestone S04 PP (280 TW)
      • Extreme Summer: Bridgestone RE-71R (200 TW), Yokohama A052 (240 TW), Nankang CR-1 (200 TW), Hankook RS-4 (200 TW), Dunlop Direzza ZIII (200 TW), Falken RT660 (200 TW), Nitto NT05 (200 TW)
  • Wider Alternative 2: Front: 255/35-18 // Rear: 285/35-18
    • Typically a direct fit, but we encourage negative camber to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity.
    • Availability:
      • Max Performance Summer: Michelin PS4S (300 TW), Hankook V12 (320 TW), Bridgestone S04 PP (280 TW)
      • Extreme Summer: Hankook RS-4 (200 TW), Nitto NT05 (200 TW)

Wheels - Option 2

  • Front: 19x9" ET50 // Rear: 19x10.5" ET44
    • Popular Fitment

Tires

  • APEX Staff Pick: Front: 255/35-19 // Rear: 285/35-19
    • Typically a direct fit, but we encourage dialing in a small amount of negative camber up front to perfect the fitment. Negative camber will also improve handling through sharper turn-in and grip throughout the corners.
    • Availability: 
      • Max Performance Summer: Michelin PS4S (300 TW), Bridgestone S-04 PP (280 TW), Continental ExtremeContact Sport (340 TW), Hankook V12 EVO2 (320 TW), Yokohama APEX V601 (280 TW)
      • Extreme Summer: Bridgestone RE-71R (200 TW)
  • Narrower Alternative: Front: 245/40-19 // Rear: 285/35-19
    • Typically a direct fit, but we encourage dialing in a small amount of negative camber up front to perfect the fitment. Negative camber will also improve handling through sharper turn-in and grip throughout the corners.
    • Availability:
      • Max Performance Summer: Michelin PS4S (300 TW), Bridgestone S-04 PP (280 TW), Continental ExtremeContact Sport (340 TW), Hankook V12 EVO2 (320 TW), Yokohama APEX V601 (280 TW)
      • Extreme Summer: Bridgestone RE-71R (200 TW), Goodyear Supercar 3 (220 TW)

Wheels - Option 3

  • Front: 19x9" ET50 // Rear: 19x11" ET46

Tires

    • APEX Staff Pick: Front: 255/35-19 // Rear: 305/30-19
      • Typically a direct fit, but we encourage dialing in a small amount of negative camber up front to perfect the fitment. Negative camber will also improve handling through sharper turn-in and grip throughout the corners.
      • Availability: 
        • Max Performance Summer: Michelin PS4S (300 TW), Bridgestone S-04 PP (280 TW), Continental ExtremeContact Sport (340 TW), Hankook V12 EVO2 (320 TW)
        • Extreme Summer: Bridgestone RE-71R (200 TW), Yokohama AD08R (200 TW)
  •  

HPDE / Club Racing Fitments

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These fitments are best suited for weekend track warriors and competitive club racers looking to maximize grip and overall performance. 9” front wheels provide superior sidewall support over the more "generic" 8.5" front wheel option, which allows drivers to extract the most performance and longevity out of a given tire compound. Wider front wheel's and tires dramatically improve the cars ability to turn into the corners, and it mitigates unwanted understeer.

 

While the 9" wheels aren't very difficult to fit under the front fenders, there are many different tire sizes and compounds that can be used, many of which will require negative camber to prevent rubbing the front fenders under suspension compression. See high-level notes under each tire combination below, or contact one of our Porsche Product Experts by submitting a fitment request form to have a more detailed one-on-one conversation about your track/race car.

 

Wheels - Option 1

  • Front: 18x9” ET46 // Rear: 18x10” ET36 
    • Popular Fitment 

Tires

  • APEX Staff Pick: Front: 245/40-18 // Rear: 275/40-18
    • Typically a direct fit, but we encourage negative camber to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity. 
    • 275/35-18 rear tires can also be used
    • Availability: 
      • Extreme Summer: Yokohama A052 (240 TW), Nankang CR-1 (200 TW), Hankook RS-4 (200 TW), Nitto NT05 (200 TW), Goodyear Supercar 3 (220 TW)
      • R-compound: Nitto NT01 (100 TW), Nankang AR-1 (100 TW)
  • Wider Alternative 1: Front: 255/35-18 // Rear: 275/35-18
    • Typically a direct fit, but we encourage negative camber to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity. 
    • Availability:
      • Extreme Summer: Bridgestone RE-71R (200 TW), Yokohama A052 (240 TW), Nankang CR-1 (200 TW), Hankook RS-4 (200 TW), Dunlop Direzza ZIII (200 TW), Falken RT660 (200 TW), Nitto NT05 (200 TW)
      • R-compound: Nankang AR-1 (100 TW), Toyo R888R
      • Semi-Slick: Hoosier R7 & A7 (40 TW)
  • Wider Alternative 2: Front: 255/35-18 // Rear: 285/35-18
    • Typically a direct fit, but we encourage negative camber to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity. 
    • Availability:
      • Extreme Summer: Hankook RS-4 (200 TW), Nitto NT05 (200 TW)
  • Wider Alternative 3: Front: 255/35-18 // Rear: 295/30-18
    • We encourage negative camber to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity. Rear fender rolling may be required.
    • Availability:
      • Extreme Summer Tire: Yokohama A052 (200 TW)
      • R Compound: Nankang AR-1 (100 TW), Toyo R888R (100 TW)
      • Semi-Slick: Hoosier R7 & A7 (40 TW), Toyo RR (40 TW)
  • Wider Alternative 4: Front: 265/35-18 // Rear: 295/35-18
    • Aggressive negative camber is required up front to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity. 
    • Availability:
      • Extreme Summer Tire: Yokohama A052 (200 TW)

Wheels - Option 2

  • Front: 18x9” ET46 // Rear: 18x10.5” ET44 
    • Popular Fitment 

Tires

  • APEX Staff Pick: Front: 245/40-18 // Rear: 275/40-18
    • Typically a direct fit, but we encourage negative camber to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity. 
    • 275/35-18 rear tires can also be used
    • Availability: 
      • Extreme Summer: Yokohama A052 (240 TW), Nankang CR-1 (200 TW), Hankook RS-4 (200 TW), Nitto NT05 (200 TW), Goodyear Supercar 3 (220 TW)
      • R-compound: Nitto NT01 (100 TW), Nankang AR-1 (100 TW)
  • Wider Alternative 1: Front: 255/35-18 // Rear: 275/35-18
    • Typically a direct fit, but we encourage negative camber to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity. 
    • Availability:
      • Extreme Summer: Bridgestone RE-71R (200 TW), Yokohama A052 (240 TW), Nankang CR-1 (200 TW), Hankook RS-4 (200 TW), Dunlop Direzza ZIII (200 TW), Falken RT660 (200 TW), Nitto NT05 (200 TW)
      • R-compound: Nankang AR-1 (100 TW), Toyo R888R
      • Semi-Slick: Hoosier R7 & A7 (40 TW)
  • Wider Alternative 2: Front: 255/35-18 // Rear: 285/35-18
    • Typically a direct fit, but we encourage negative camber to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity. 
    • Availability:
      • Extreme Summer: Hankook RS-4 (200 TW), Nitto NT05 (200 TW)
  • Wider Alternative 3: Front: 255/35-18 // Rear: 295/30-18
    • Aggressive negative camber is required to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity. 
    • Availability:
      • Extreme Summer Tire: Yokohama A052 (200 TW)
      • R Compound: Nankang AR-1 (100 TW), Toyo R888R (100 TW)
      • Semi-Slick: Hoosier R7 & A7 (40 TW), Toyo RR (40 TW)
  • Wider Alternative 4: Front: 265/35-18 // Rear: 295/35-18
    • Aggressive negative camber is required up front to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity.
    • Availability:
      • Extreme Summer Tire: Yokohama A052 (200 TW)
  • Wider Alternative 5: Front: 245-645-18 // Rear: 305-660-18
    • Aggressive negative camber specifications are required to prevent rubbing upon suspension compression, and to fully leverage the potential of the slicks. 
    • Availability:
      • Slick: Pirelli DH
  • Wider Alternative 6: Front: 265-645-18 // Rear: 305-660-18
    • Aggressive negative camber specifications are required to prevent rubbing upon suspension compression, and to fully leverage the potential of the slicks. 
    • Availability:
      • Slick: Pirelli DH

Wheels - Option 3

  • Front: 19x9" ET50 // Rear: 19x10.5" ET44
    • Popular Fitment

Tires

  • APEX Staff Pick: Front: 255/35-19 // Rear: 285/35-19
    • Typically a direct fit, but we encourage dialing in a small amount of negative camber up front to perfect the fitment. Negative camber will also improve handling through sharper turn-in and grip throughout the corners.
    • Availability: 
      • Max Performance Summer: Michelin PS4S (300 TW), Bridgestone S-04 PP (280 TW), Continental ExtremeContact Sport (340 TW), Hankook V12 EVO2 (320 TW), Yokohama APEX V601 (280 TW)
      • Extreme Summer: Bridgestone RE-71R (200 TW)
  • Narrower Alternative: Front: 245/40-19 // Rear: 285/35-19
    • Availability:
    • Max Performance Summer: Michelin PS4S (300 TW), Bridgestone S-04 PP (280 TW), Continental ExtremeContact Sport (340 TW), Hankook V12 EVO2 (320 TW), Yokohama APEX V601 (280 TW)
    • Extreme Summer: Bridgestone RE-71R (200 TW), Goodyear Supercar 3 (220 TW)
  • Wider Alternative 1: Front: 265/35-19 // Rear: 295/35-19
    • Negative camber is encouraged to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity.
    • Availability:
      • R-compound: Michelin Cup 2 (180 TW)
      • Semi-Slick: Hoosier R7 (40 TW)
  • Wider Alternative 2: Front: 265/35-19 // Rear: 295/30-19
    • Negative camber is encouraged to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity.
    • Availability:
      • Extreme Summer Tires: Yokohama AD08R (200 TW), Goodyear Supercar 3 (220 TW)
      • R-compound: Pirelli Trofeo R (60 TW)
      • Semi-Slick: Hoosier R7 & A7 (40 TW)

Wheels - Option 4

  • Front: 19x9" ET50 // Rear: 19x11" ET46

Tires

  • APEX Staff Pick: Front: 265/35-19 // Rear: 295/35-19
    • Negative camber is encouraged to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity.
    • Availability:
      • R-compound: Michelin Cup 2 (180 TW)
      • Semi-Slick: Hoosier R7 (40 TW)
  • Shorter Alternative: Front: 265/35-19 // Rear: 295/30-19
    • Negative camber is encouraged to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity.
    • Availability:
      • Extreme Summer Tires: Yokohama AD08R (200 TW), Goodyear Supercar 3 (220 TW)
      • R-compound: Pirelli Trofeo R (60 TW)
      • Semi-Slick: Hoosier R7 & A7 (40 TW)
  • Wider Alternative: Front: 265/35-19 // Rear: 305/30-19
    • Negative camber is encouraged to prevent rubbing upon suspension compression with wider compounds, and to maximize performance and tire longevity. 
    • Availability: 
      • Extreme Summer Tires: Bridgestone RE-71R (200 TW), Yokohama AD08R (200 TW), Goodyear Supercar 3 (220 TW)
      • R-compound: Toyo R888R (100 TW), Michelin Pilot Sport Cup 2 (180 TW), Pirelli Trofeo R (60 TW), Nankang AR-1 (100 TW)
  • Narrower Alternative: Front: 255/35-19 // Rear: 305/30-19
    • Typically a direct fit, but we encourage dialing in a small amount of negative camber up front to perfect the fitment. Negative camber will also improve handling through sharper turn-in and grip throughout the corners.
    • Availability: 
      • Max Performance Summer: Michelin PS4S (300 TW), Bridgestone S-04 PP (280 TW), Continental ExtremeContact Sport (340 TW), Hankook V12 EVO2 (320 TW)
      • Extreme Summer: Bridgestone RE-71R (200 TW), Yokohama AD08R (200 TW)

GT4/Spyder Specific Fitments

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Wheels - Option 1

  • Front: 19x9" ET50 // Rear: 19x10.5" ET44
    • Popular Fitment

Tires

  • APEX Staff Pick: Front: 255/35-19 // Rear: 285/35-19  
    • Availability: 
      • Max Performance Summer: Michelin PS4S (300 TW), Bridgestone S-04 PP (280 TW), Continental ExtremeContact Sport (340 TW), Hankook V12 EVO2 (320 TW), Yokohama APEX V601 (280 TW)
      • Extreme Summer: Bridgestone RE-71R (200 TW)
  • Narrower Alternative 1: Front: 245/40-19 // Rear: 285/35-19
    • Availability: 
      • Max Performance Summer: Michelin PS4S (300 TW), Bridgestone S-04 PP (280 TW), Continental ExtremeContact Sport (340 TW), Hankook V12 EVO2 (320 TW), Yokohama APEX V601 (280 TW)
      • Extreme Summer: Bridgestone RE-71R (200 TW), Goodyear Supercar 3 (220 TW)
  • Wider Alternative 1: Front: 265/35-19 // Rear: 285/35-19
    • Availability: 
      • Max Performance Summer: Michelin PS4S (300 TW), Bridgestone S-04 PP (280 TW), Continental ExtremeContact Sport (340 TW), Hankook V12 EVO2 (320 TW), Yokohama APEX V601 (280 TW)
      • Extreme Summer: Bridgestone RE-71R (200 TW), Goodyear Supercar 3 (220 TW)
      • R-compound: Toyo R888R (100 TW)
  • Wider Alternative 2: Front: 265/35-19 // Rear: 295/35-19
    • Availability: 
      • Max Performance Summer: Michelin PS4S (300 TW)
      • R-compound: Michelin Cup 2 (180 TW)
      • Semi-Slick: Hoosier R7 (40 TW)
  • Wider Alternative 3: Front: 265/35-19 // Rear: 295/30-19
    • Availability: 
      • Max Performance Summer: Michelin PS4S (300 TW)
      • Extreme Summer Tires: Yokohama AD08R (200 TW), Goodyear Supercar 3 (220 TW)
      • R-compound: Pirelli Trofeo R (60 TW)
      • Semi-Slick: Hoosier R7 & A7 (40 TW)

Wheels - Option 2

  • Front: 19x9" ET50 // Rear: 19x11" ET46
    • Popular Fitment

Tires

  • APEX Staff Pick: Front: 265/35-19 // Rear: 295/35-19
    • Availability: 
      • Max Performance Summer: Michelin PS4S (300 TW)
      • R-compound: Michelin Cup 2 (180 TW)
      • Semi-Slick: Hoosier R7 (40 TW)
  • Alternative: Front: 265/35-19 // Rear: 295/30-19
    • Availability: 
      • Max Performance Summer: Michelin PS4S (300 TW)
      • Extreme Summer Tires: Yokohama AD08R (200 TW), Goodyear Supercar 3 (220 TW)
      • R-compound: Pirelli Trofeo R (60 TW)
      • Semi-Slick: Hoosier R7 & A7 (40 TW)
  • Alternative 2: Front: 255/35-19 // Rear: 305/30-19
    • Availability: 
      • Max Performance Summer: Michelin PS4S (300 TW), Bridgestone S-04 PP (280 TW), Continental ExtremeContact Sport (340 TW), Hankook V12 EVO2 (320 TW)
      • Extreme Summer Tires: Bridgestone RE-71R (200 TW), Yokohama AD08R (200 TW)
      • R-compound: Michelin Cup 2 (180 TW)
  • Alternative 3: Front: 265/35-19 // Rear: 305/30-19
    • Availability: 
      • Max Performance Summer: Michelin PS4S (300 TW)
      • Extreme Summer Tires: Bridgestone RE-71R (200 TW), Yokohama AD08R (200 TW), Goodyear Supercar 3 (220 TW)
      • R-compound: Toyo R888R (100 TW), Michelin Pilot Sport Cup 2 (180 TW), Pirelli Trofeo R (60 TW), Nankang AR-1 (100 TW)
  •  

Big Brake Kit Clearances
Brake-Clearance.jpgThe following factory and aftermarket big brake setups have been tested and confirmed to clear:

 

GT4/Spyder Chassis

  • Factory Steel 6 piston 380mm - fits SM-10 19x9" ET50 only
  • Factory PCCB 6 piston 410mm - requires 20" wheels
  • AP Racing 13.01.10083  CP9661 6 piston 394mm - fits SM-10 19x9" ET50 only

All other Cayman/Boxster Chassis  

  • Factory Base 4 piston 350mm - fits all
  • Factory S/GTS 4 piston 350mm - fits all
  • Factory PCCB 6 piston 350mm - fits all
  • Brembo 1M1.9040A 6 piston 380mm - fits SM-10 18x8.5" ET42 & SM-10 18x9" ET46 only
  • Brembo 1N3.8021A 6 piston 350mm - fits all
  • AP Racing 13.01.10096 CP9661 6 piston 372mm - fits all
  • AP Racing 13.01.10072 CP9661 6 piston 355mm - fits all

Still have questions?
Fill out our Fitment Recommendation form
Call us: 925-245-0773
Email us: [email protected]

 

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