FYI: This is what Suncoast Porsche Parts and Accessories says about the spare tire kit they sell:
"Factory spare Tire kit for the rear of a Cayman, fits perfectly under the rear hatch. Nylon straps connect to the rear tie-down fasteners, and hardware is contained inside the storage bag. This all-inclusive kit comes with a spare tire, storage bag, scissor jack, and rim wrench. A handy accessory, ideal for road trips.
Install and drive with caution, intended for short distances at low speeds. Fits all 2006-2012 Cayman models. Not compatible with the Ceramic Brake System.
How does this work?
- For a flat front tire - This is a direct replacement for the stock front wheel.
- For a flat rear tire - This scenario requires an additional step. In this case, the spare tire must be installed on your front of the car, and your front wheel/tire must be transferred to the rear (to replace the defective rear wheel). In other words, this spare tire won't fit on the rear, so you can use your front tire as a temporary replacement.
This can vary on certain models, but accurate for most."
https://www.********************************************** ******.com/product/CSTK.html
Suncoast doesn't include the jackpad that's necessary to avoid damaging the underside of the car when jacking it up, so that's another necessary purchase.