Adam,

a long time ago I put 235/40X18 tires (in the front)on the car and it WILL rub with them on....and it will significantly decrease your steering radius. I ultimatly after 1 week of dring that way went back to the 225's....I did however like and stay with 275's in the rear. No rubbing trouble there....

They don't make the PS2s for the 17s. Any other recommendations? I was thinking of the Michelin Pilot Sport A/S. Thanks.

No PS2 for 17"? Maybe they are available from another vendor?
All season Pilot sports sounds great but I don't think they mean snow when they say all season. A change of tires seems unavoidable. Maybe the summer only original Pilot Sports? They seem to be the most popular.

As far as winter drving I'm planning on switching tires this November and then running summer tire around April.
I plan on doing a fair bit of driving instruction/Autocross here in New Jersey so I'm looking for a good street tire that is decent on the track/Autocross.

here's a reply I got on the NNJ PCA forum:

"The PS2s, as you pointed out, have received excellent reviews from just about everyone I know that has experienced them. One friend of mine that has tried just about every wheel/tire combo on his M3 has said that these PS2s give a great balance of feedback, grip, agility, and ride quality. They would be a good choice.

Also to be considered would be a BF Goodrich KD. They were tested against the Falkens and other "near R-Comps" by Grassroots about a year ago, and won the street tire portion of the test.

That said, the best street tire still came in (in that test) a full two seconds behind the worst R-Comp (which in this test was the Toyo RA-1). If you were interested in a R-Comp that is extremely livable and durable on the street, autox, and track, I would suggest the RA-1. I have a set on my 911 and have yet to see a downside. They are even great in frigid temps...unheard of in the scheme of R-Comps. "

I checked with TireRack and although they don't make a PS2 in 205/50-17, a 225/45-17 will fit without any mods. Can anyone confirm this? I am not planning on driving much during the snow, but thought I could take advantage of the longer tread life of the A/S tires without sacrificing much performance. How much performance would I lose over the PS2s? Also, I don't plan on tracking the car, but I will put it though it's paces on the street ;)

well you will be ok in the back but that won't work up front. I'm sure it will affect the turning radius.
Best to call the tire rack, they love to talk wheels and tires. Don't feel any pressure to by with them.
Here in New Jersey give Euro Tire a call.

http://www.eurotire.com/

Has anyone tried the Michelin Pilot Sport A/S (all seasons) version on the boxster? I drive mine in the winters and that's pretty much the only all season tire i've considered short of getting a second set of wheels for winter tires but would really rather not do that....

My dealer frowns when i say all season tires on a porsche. They told me if I were looking at all season tires i'd better go get a sedan :matchup:

Christian -

Dunlop SP 9090 Tires
 

Four months ago I purchased the SP 9090 Dunlop tires. While driving home in the rain the other night I experienced severe hydroplaning. To my surprise; I noticed that my rear tires were completely worn out. I only have 2400 miles on the tires. I'm very disappointed with Dunlop tires... Has anyone else had wear problems with the 9090 tires?

Holy cow :eek:

That's a third of the mileage you should be getting as a bare minimum... unless you've been very hard on them and done a lot of tire spinning or drifting.

If not, I'd be down at the shop getting a 4 wheel laser alignment to see what's going on in the back.

Hi,

The Dunlops are very soft, treadwear rating of 280. They do wear quickly and non-linearly. Still, you should get at least 3-5 times the wear you have. Performance Tires differ from M&S Passenger Car tires in that they require more care and maintenance to maximize their lifespan. They are much more sensitive to abuse and improper pressures.

My suspiscion is one of several things, or a combination of them. You have some fairly acute alignment issues, especially on the rear. You have lowered the car increasing the negative camber (probably inadvertently), increasing the Car's tire-eating abilities. Tire pressures were not properly monitored. You drive the car fairly hard. The roads are bad in your area. You've been using your Boxster to compete in Tractor Pulls... ;)

Seriously, I have the same tire on my Esprit and love the performance, I'm on my 2nd set. The Esprit eats rear tires as badly as the Boxster, but I still got 15k mi. from them on my 1st set and the 2nd set is at 8k mi. w/ plenty of tread left. This is what leads me to believe that your experience is an aberration and either the Car or the Driver (or both) are at fault. Hope this helps...

Happy Motoring!... Jim'99

Toyo RA-1s are R comp tires. I bought a set for my Boxster. I ran them for 2 seasons on my 911. Really good overall tires for AX and DE. NOT as sticky as Victoracers, V710s, Hoosiers or Avons but better than MPSCs and the rest.

They had a better life span than my Victoracers, but only by 2-4 track days, or 5-6 autocrosses. Yes, I am hard on my tires ;)

I didn't read all the fine print of this thread but I second what Perfectlap says. Regular tires will get chewed up quicker than usual if you autocross a lot. You can find an old set of 17" OEM wheels (cheaper tires and usually lighter weight) for around $500 and throw some cheaper track tires on for $500 (Falken RT-615's come to mind). This will protect your $1000 set of everyday tires and in the end you can sell the wheels (and whats left of the tires) and regain some of what you spent.

Check the rulebook!

Changing tires can affect the class you run in. An "R" comp tire can put you in an improved or modified class that, depending on what you have done to your car can put you at an extreme disadvantage. Many clubs use a treadwear rating of 140 as a guideline. Above 140=street tire. Below 140=competition tire.

I was worried about this as well but in all the events I've ran with SCCA my Victoracers didn't move me into a different class (kind of sort of but not really). In Chicago and Milwaukee SCCA the race tires make you a true AS. Before I put race tires on I would run "Street Tire" AS or "Street Tire" RWD. I'm pretty sure SCCA nationals is set up this way as well even thought I doubt anyone shows up without race tread.

This has been my experience so I'm hoping a SCCA rule expert can comment...

Of course there are autocross clubs outside of SCCA...

I have about 20,000 miles on a set of 225/45 x 17 inch Pzero N2 tires on the front my 01. No issues at all, except it reduced understeer!!

If tread life is the most important factor would an all season (Yokohama ADVAN S.4.) tend to last longer than a summer tire (Michelin Pilot Sport PS2)? --- Assuming the same driving conditions

Also, which one would do better in wet conditions???

The National classing structure doesn't have any "street tire stock" classes like Milwaukee region (and others) do. Nationally, whether you run R-comps or regular (140+ treadwear tires) your Boxster is in A Stock.

My co-driver and I are signed up for the Milwaukee National Tour, you should show up and help us fill up A Stock with Boxsters! :)

Quote:

"Four months ago I purchased the SP 9090 Dunlop tires. While driving home in the rain the other night I experienced severe hydroplaning. To my surprise; I noticed that my rear tires were completely worn out. I only have 2400 miles on the tires. I'm very disappointed with Dunlop tires... Has anyone else had wear problems with the 9090 tires?"

Originally Posted by Jetmd


I just got back from a road trip to Florida this week, 700+ miles each way. On the way back today there was a lot of rain down south, and I was suprised at how much my PS2's were hydroplaning. The rear tires have less than 4k on them and are showing less than 3/16" of tread. I have been trying to take it easy on this set of rears, but it looks like I will not get 6K out of them. BTW, the front set has 9K+ on them and is showing 1/4" of tread.

Ed

:(