18-inch road and backroad
- Front
- 18 × 8.5 inch, ET45 · 235/40 R18
- Rear
- 18 × 10 inch, ET35 · 265/40 R18
LFI's Cayman guide gives this as its 987 18-inch size with 235/40 and 265/40 tyres, and shows it on a customer's 2005 987.1.
2005–2012 · coupe
Porsche Cayman 987 wheel fitment
The first Cayman came on staggered 17-inch wheels, with 18s on the Cayman S and 19s on the Cayman R. Owners building for track days usually move to wider 18-inch wheels for the bigger choice of track tyres, while Porsche's own 19-inch wheels are approved across the range for road cars.
5x130 bolt pattern · 71.6 mm centre bore · Stock wheels: 17 × 6.5, 17 × 8, 17 × 7, 17 × 8.5, 18 × 8, 18 × 9, 19 × 8.5, 19 × 10 inch · Stock tyres: 205/55 R17, 235/50 R17, 235/40 R18, 265/40 R18, 235/35 R19, 265/35 R19
Updated 2026-10-31 · High source confidence. Check your exact trim and market. How we check specs
Quick specs
| Specification | Value |
|---|---|
| Bolt pattern | |
| Stock tyre sizes | |
| Centre bore | 71.6 mm |
| Fastener and thread | Wheel bolt, M14x1.5 |
| Tightening torque | Confirm in your handbook |
Stock wheels and tyres
Factory options vary by trim and market. Match your car to the row below and check its tyre placard before using it as a baseline.
| Trim | Axle | Wheel | Tyre |
|---|---|---|---|
| Cayman, 17-inch (2005–2008) | Front | 17 × 6.5 inch, ET55 | 205/55 R17 |
| Cayman, 17-inch (2005–2008) | Rear | 17 × 8 inch, ET40 | 235/50 R17 |
| Cayman, 17-inch (2009–2012) | Front | 17 × 7 inch, ET55 | 205/55 R17 |
| Cayman, 17-inch (2009–2012) | Rear | 17 × 8.5 inch, ET40 | 235/50 R17 |
| Cayman S, 18-inch | Front | 18 × 8 inch, ET57 | 235/40 R18 |
| Cayman S, 18-inch | Rear | 18 × 9 inch, ET43 | 265/40 R18 |
| Cayman R, 19-inch | Front | 19 × 8.5 inch, ET55 | 235/35 R19 |
| Cayman R, 19-inch | Rear | 19 × 10 inch, ET42 | 265/35 R19 |
Explained in our guides
Read these before choosing wheels for the Cayman: they explain the offset, fitment and hub numbers in this guide.
- Wheel offset explained: choosing ET without guessingUnderstand positive and negative wheel offset, calculate inner clearance and outer position, and choose an ET using measurements from your own car.
- Flush, poke and tucked fitment: measure the whole tyreUnderstand flush, poked and tucked wheels, calculate how width and offset change the look, and check clearance beyond a parked side-on photograph.
- Staggered vs square wheels: tyres, rotation and AWDCompare square and staggered wheel setups, calculate front-to-rear tyre diameter, and understand rotation limits and all-wheel-drive requirements.
Popular community setups
Starting points for a build. Read the notes with each setup, especially if your car is lowered or has different brakes.
18-inch track width
- Front
- 18 × 9 inch, ET46 · 245/40 R18
- Rear
- 18 × 10 inch, ET35 · 275/40 R18
A 2011 Cayman owner on Rennlist bought this 18x9 ET46 and 18x10 ET35 set for 245/40 and 275/40 tyres on standard suspension, and other 987.2 owners there run similar 18-inch sets with 245 to 255 front and 275 to 295 rear track tyres.
19-inch road
- Front
- 19 × 8.5 inch, ET45 · 235/35 R19
- Rear
- 19 × 10 inch, ET35 · 265/35 R19
LFI shows several 987.2 customer cars on 19x8.5 ET45 and 19x10 ET35 wheels, and recommends 235/35 and 265/35 tyres at this diameter.
Width and offset guidance
Offset range
Check the exact setup
There is no confirmed range for this car yet. Compare a known wheel with your proposed size and measure both sides.
Common width limit
Measure before ordering
A maximum width has not been confirmed. Tyre shape, ride height and alignment all change the available space.
These figures belong to the setups described here. Combining the widest wheel with either end of the offset range does not guarantee a safe fit. For how ET moves the wheel in and out, read wheel offset explained; for how far the tyre can sit out, see flush, poke and tucked fitment.
Clearance notes
- The base Cayman's 17-inch wheels changed with the 2009 update, from 6.5J ET55 and 8J ET40 to 7J ET55 and 8.5J ET40, keeping the same tyre sizes.
- Porsche approves its 19-inch Cayman R wheel (8.5J ET55 front, 10J ET42 rear, 235/35 and 265/35 tyres) for the Cayman and Cayman S as well as the R.
- Porsche approves 5 mm spacers on each wheel with the factory 17, 18 and 8J/9.5J 19-inch combinations. Snow chains cannot then be fitted.
- Porsche gives two wheel-bolt torques. Silver bolts up to the 2011 model year take 130 Nm. Silver bolts from the 2012 model year and black bolts take 160 Nm. Check which bolts the car has before tightening.
- Factory wheels use ball-seat bolts. LFI notes that a wheel with a 71.6 mm bore needs no hub rings.
- Check full steering lock and suspension travel with the car loaded. Match wheel load rating, tyre load and speed ratings, fastener seats and brake clearance.
See it on your car.
Upload a photo and start with a look that suits the Cayman. Try the wheels, colour and stance before you spend on parts.
An AI preview shows the look. It cannot verify physical fitment.
Run the numbers
These tools start with the Cayman, 17-inch (2005–2008) front size. Choose your own trim or axle in the calculator if it differs.
Questions
What is the 987 Cayman bolt pattern?
5x130 with a 71.6 mm centre bore and M14x1.5 wheel bolts.
What is the wheel-bolt torque on a 987 Cayman?
It depends on the bolts. Porsche specifies 130 Nm for silver bolts up to the 2011 model year and 160 Nm for later silver bolts and for black bolts.
Can I fit Cayman R wheels to a Cayman or Cayman S?
Yes. Porsche approves the 19-inch Cayman R wheel, 8.5x19 ET55 front and 10x19 ET42 rear on 235/35 R19 and 265/35 R19 tyres, for all three models.
What 18-inch sizes do 987 track cars run?
18x9 ET46 front and 18x10 ET35 rear is a common choice, with 245/40 and 275/40 tyres or wider track tyres. LFI's milder 18x8.5 ET45 and 18x10 ET35 suits 235/40 and 265/40.
What size tyres does the Porsche Cayman 987 have?
Factory tyre (tire) sizes for the 2005–2012 Porsche Cayman 987 are 205/55 R17, 235/50 R17, 235/40 R18, 265/40 R18, 235/35 R19 and 265/35 R19, depending on trim, with wider rears on staggered setups. Your tyre placard shows the size for your car.
What wheel size does the Porsche Cayman 987 use?
Factory wheels are 17 × 6.5 inch, 17 × 8 inch, 17 × 7 inch, 17 × 8.5 inch, 18 × 8 inch, 18 × 9 inch, 19 × 8.5 inch and 19 × 10 inch, depending on trim. The stock table lists the offset for each.
What is the Porsche Cayman 987 centre bore?
71.6 mm. Aftermarket wheels with a larger bore need hub-centric rings sized to it.
Specs checked against
- Porsche bulletin 65/21: approved summer tyres, wheels and spacers, Cayman 987 from 2009
- Porsche bulletin 67/21: approved summer tyres, wheels and spacers, Boxster and Cayman 987 to 2008
- Porsche workshop data: 2008 Cayman wheel bolt torque
- TireWheelGuide: 2008 Cayman bolt pattern, bore and thread
- Cararac: Cayman 987 factory wheel sizes
- LFI: Cayman and Boxster 987, 981 and 718 fitment guide
- Porsche Club GB: 987 wheel bolt torque discussion
- Rennlist: 18-inch wheels on 987s
- Rennlist: 987.2 Cayman 18x9 and 18x10 wheel question
This guide is a starting point, not a fitment guarantee. Specs can differ by market, trim and previous modifications. Confirm all sizes, clearances and fastener requirements with a qualified wheel and tyre professional before buying or fitting parts.
Related cars
More guides from Porsche or cars with the same bolt pattern. A matching pattern alone does not make a wheel interchangeable.