Ebay center Caps
 

I want to buy a set of replacement center caps since all my crests have fallen off. How do I know which Size my car takes? my car is an 02 boxster base with 17inch wheels fyi

Ebay has alot of sellers offering sets of 4 caps for 25ish dollars, but they are offered in a few different sizes such as 60mm and 64mm.

My caps measure 130mm in diameter so thats obviously not the measurement they are looking for.

130mm is over 5". I measured mine at about 77 mm, or about 3". I think you need to re-check that measurement.

Know that the $25 sets are cheap Chinese knock-offs. They will last a couple of years before the paint starts to flake off.

I bought these. Pretty good for money.

http://www.ebay.com.au/itm/ws/eBayISAPI.dll?ViewItem&item=170855056703

Original caps are expensive even on Ebay and be careful with the knockoffs. Just buy the crests. One of my crests fell off so I bought 4 off these ($38 total) and will keep the 3 for spares. They have double-side tape on the back. Good quality and perfect fit.

Porsche Rim Wheel Center Hub Cap Emblem Badge 987 996 997 911 Boxster Cayman S | eBay

Don't know how particular you are but my caps have a ring around the crest. Some caps on Ebay don't have this ring.

http://i241.photobucket.com/albums/f...l/wheelcap.jpg

I like the cleaner look of no ring.

The outer diameter measurement for an oem Porsche center cap is - 3.0" (76mm), and the inner diameter measurement is 2.37" (60mm). My guess is that 60mm or 64mm refers to size of the crest .