Tire sizes are F: 225x40x18 R: 295x30x18
Original tires were Michelin Sport

Go directly to the Tire Rack.com do not pass go, do not collect $200.00. Seriously, go to the tire rack is web-site. It is the absolute best. They test every tire they sell for every car on the market and publish the results in graph form. Check it out!!!! Their prices are the best, as well.

Pirelli Scorpion off road tires. REAL BIG ONES!

Tire choice will depend alot on what u r looking for in a tire. For me, my current choices r aimed mainly at performance. l run the Bridgestone RE01R for the street & the Kuhmo V710 for the track (and have used the RE01R for track events when it gets wet). Prior to the Bridgestone l had BFG TA/KDs.

The RE01R is a good tire, very predictable in the dry, though when driven hard, it is a real handfull in the wet (actually took about as much effort to drive in the wet as the V710 in the same conditions, though it was much quicker). It is a bit quieter than the TA/KD that it replaced, has more grip. but (something l really like about it), it has that same immediate feel to turn in.

Some other canidates: Bridgestone RE050A Pole Position (not the regular RE050). Just a step under the RE01R; this tire feels very much like the earlier S03, though a little quieter & softer riding, but with all the grip of the S03. It is a very good tire in the wet, & I've found it to be longer wearing than the S03 as well. A very solid choice.

Michelin PS2: another top notch street tire that does alot of things well. l like this tire, though honestly I've found them more sensative to large slip angles as u approach the limit (suprisingly, more sensitive than Hoosiers or other tires well known for this). As such they often feel understeery if the car is not setup around them (can feel nice & planted when under the limit, but not so nice at the limit). That said, they r offer alot of grip in a package that can be used daily in most weather, & this is the most direct replacement for what u have now.

On the bargin side, the Kuhmo Ecsta MX is not so far behind the above tires for much less money. Tires like the Yoko Advan or Pirelli P Zero r very servicable choices, though pricewise will be up there with the top choices in this area, & not quite up to par on performance.

In terms of absolute maximum performance. obviously tires like the Kuhmo V710 or Hoosier R6 will represent the top level of street legal rubber, though neither is very usable on the street (both great track tires though). However, one R-Compound tire is pretty usable on the street, & that is the Toyo Proxes RA1. It is a great tire in the wet at full tread depth, & very long lasting by R-Compound standards (and not needing an initial heat cycling, & not overly sensitive to too many heat cycles). The new R888 from Toyo looks to follow in this tradition, & Nitto is using the same compound as the RA1 in their current R Comps. Though, unless u r familar with tires like these, probably better to keep all of these from ur list.

l would also avoid any of the N rated tires. These were specified by Porsche as for ur car; which is generally a good thing, except that this was done 10 years ago. As such, these tires r 10 year old technology, easily topped by the current front runners. & the N rated tires will generally have a premium price as well. You can do much better for less.

l personally lean toward the tires with the N0, N1, N2, N3 ratings because these tire were designed with the help of Porsche in that they react in a positive manner with the suspension. l know there are newer designed tires out there, but l do not worry about the reactions with my ''N'' tires at 180mph either. At that speed l worry about the ditch at the side of the road ;)