997Austin

I have the original 2007 lobster fork 8x19, 11x19 wheels on my Carrera S. I am interested in new wheels. Other than the OEM size, what sized wheels can I be looking at without modification? Suggestions are welcome. Thanks.

997_Toronto

That should depend on what tires you plan on running. Are you going tractor-style 325s on the rear or sticking with the 305s? You don't want the tires to stretch too much on the rim so unless you want wider tires I would recommend staying with stock.

I run 19-inch OEM rims that are 19x11 and 19x8.5 with 305x30x19s on the rear and 235x30x19s on the front. Due to the wider front rim, there is very little rubber between the rim & the ground which bothers me a little.

Mojo31

Next time go with 35s on the front in the same width. You won't notice the aspect difference from front to rear and you get a little more sidewall.

myw

go with same tires sizes with about 10mm more aggressive both front and rear offsets.

19x8.5 +mid-40s
19x11 +mid-50s (if widebody mid +40s)

would look great, not rub while keeping as light (and oem sized) setup as possible. its the most common route from what ive seen imo.

Schpee007

Toward the back of the manual you should be able to find all OEM fitment options.

semicycler

There are two questions here - (1) tires size changes with the same wheel and (2) different wheel sizes altogether with appropriate tires to match. The important part is to keep the rolling diameter of the wheel/tire combo the same so that the speedometer and traction control operates properly. Don't forget this!

When going from 19" wheels with mounted tires down to 18" or 17" wheels with mounted tires, the amount of rubber increases (side wall profile) to keep the overall outside diameter the same. Keeping the same size wheel but changing tires is a tradeoff in width/aspect ratio to again, keep the outside diameter the same.

If you want minor tire size variations keeping your lobster wheels, there are only a few options to consider. For the rears, OEM's are 295's. Some run 305's, others 315's. But in each case the aspect ratio is different to keep the overall rolling diameter the same (less than 5% variation, less than 2% preferred).

If you are looking for a whole new setup, you need to know both current wheel and current tire specs. For the wheel its diameter, width and offset. For tires its width, aspect ratio and diameter (speed rating too, but not needed for sizing). As stated above, the user manual has this info in it. You can also look on the tire itself. Wheels are often stamped on the inside with diameter & width. Lobster offsets are stamped near the valve stem.

The easiest thing to do is match/near match current specs when going with a new setup. If you have spacers now, include those numbers in the offsets for the new setup so the spacers are built in. Be careful with the calculation here though as the spacer subtracts from the offset but pushes a wheel out (do the research, you'll figure it out).

The best advice I could give is find a wheel manufacturer/style you like, find a vendor here on the forums that distributes those wheels, and call them for sizing information. Second best is match OEM sizing.

chawks

I would be interesting in purchasing the lobster claws if you are going to sell. Looking for a clean set.

SecretAsianMan

I bought a set of BBS wheels from a Rennlister, they are 19x9 +53 offset in front and 19x11 +56 in rear. With OEM sized tires they are a perfect fit. Flush with the fenders, I think it's as wide as you can go with zero rubbing. It looks OEM.

wc11

Try this comparator

http://tire-size-conversion.com/tire-size-calculator/