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Track day tires for us euro guys!

Old 09-07-2009, 12:42 PM
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Good to know! i am a law student... i thought you were into the automotive industry considering what you did on hondas !
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Old 09-07-2009, 12:50 PM
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I know alittle bit about how cars work
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Old 09-07-2009, 01:05 PM
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The engineers at Toyo says 235/25,4 is optimal in rim wide.
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Old 09-07-2009, 01:09 PM
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Ok I wasn't doubting you, it sounds like the same thing advan used to do with there race tires they were 10mm wider than they said they were.

Example: There 255's measured to be 265's
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Old 09-07-2009, 01:10 PM
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Originally Posted by StuttgartRX8 View Post
I know alittle bit about how cars work
If you have access to some good machines we might talk about something fun to do!
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Old 09-07-2009, 01:15 PM
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Originally Posted by StuttgartRX8 View Post
Ok I wasn't doubting you, it sounds like the same thing advan used to do with there race tires they were 10mm wider than they said they were.

Example: There 255's measured to be 265's
No I didnt take it that way either I just like to argue my point. =)

I felt at last track day that I should have more stretch in my tires to get a better usage of my tires.

I guess R Tires works better on wider rims (and of course lower pressure) compared with street tires. I got alot of stess on the outside of the tires in tight corners (to mutch flex).
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Old 09-07-2009, 01:23 PM
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Ok what tires did you switch from before you got the R888's

I drove a car this past year with the R888's and I noticed they got real greasy after alot of runs. Have you noticed this problem?
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Old 09-07-2009, 01:26 PM
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Stuttgart read my previous message!

The right rim width will provide a noticeable increase in performance. The problem is that setting up the coilovers for different rims\tires is very hard!
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Old 09-07-2009, 01:33 PM
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Oh sorry man I didn't see that, I don't have too many machines available to use for personal use. I guess they don't trust us with the expensive stuff.
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Old 09-07-2009, 01:35 PM
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Too bad, i have some housings and irons to play with but cnc machining is expensive here!
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Old 09-07-2009, 01:51 PM
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crap im running falkens 452 (245 40 18 ) on 7.5 width . i was changing my tires today and found out they were not 8 width, i pay the car with the rims already install,,,,

Last edited by rx 8speciale; 09-07-2009 at 01:54 PM.
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Old 09-07-2009, 01:55 PM
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I wouldn't run 7.5's on an Rx8 its comes with 8" wide rims stock
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Old 09-07-2009, 02:10 PM
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thats the only one i got , the seller didnt have stock rims...
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Old 09-07-2009, 02:11 PM
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buy stuttgart's ultraleggeras!
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Old 09-07-2009, 02:13 PM
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i have been running on these for 1.5 years and drag race on 6 race wars events. i might buy yours
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Old 09-07-2009, 02:18 PM
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Originally Posted by StuttgartRX8 View Post
Ok what tires did you switch from before you got the R888's

I drove a car this past year with the R888's and I noticed they got real greasy after alot of runs. Have you noticed this problem?
I was running stock rims with Michelin PS2 so its not really comparebly, I purchased new rims with R888 last winter.

Yeah if I push my car really hard for many laps in a row then they can get the feeling of slippery/greasy. My solution is to lower the pressure or back off and do a cool down lap.

My theory is to go more stretch and low pressure for not letting them overheat (get greasy) and stopp from flexing in some situations.
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Old 09-07-2009, 02:22 PM
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R888s always do that. just wait and then get some advan a048 for comparison!
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Old 09-07-2009, 02:30 PM
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But they are really pricey here and the good thing with R888 is that they are capable of running on streets (not so mutch for carring with me a set of track wheels in my car and change before and after)

Perhaps they get better with correct rim wide? im going to try more camber in front and a little toe out as well.
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Old 09-07-2009, 02:33 PM
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Yes they'll perform better with the right rim width. You will notice the same problem though, only a bit later.
Aren't a048 road legal for you? check camskill.co.uk again, r888 and a048 have got similar prices.
I also found the federal rsr595 for 200€ a piece on another site.
I Would stick with a 235\40 though, we're still running na cars!
Giorgio
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Old 09-07-2009, 02:55 PM
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a048 is road legal, I will check out camskill.
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Old 09-07-2009, 03:26 PM
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Originally Posted by azathoth View Post
I was running stock rims with Michelin PS2 so its not really comparebly, I purchased new rims with R888 last winter.

Yeah if I push my car really hard for many laps in a row then they can get the feeling of slippery/greasy. My solution is to lower the pressure or back off and do a cool down lap.

My theory is to go more stretch and low pressure for not letting them overheat (get greasy) and stopp from flexing in some situations.
Before this year I was running the Azenis in 225/45-18 on my stock rims so I still had sticky tires with a stiff sidewall. This year I decided to run 245/40-18 Azenis on the OZ wheels. I noticed I had alot more grip with the 245's on the 8 rim and I noticed the contact patch was alot wider also from the old set of tires. I don't really understand the stretching i would think you would want a wider tire so you can have max grip without sacrificing tire pressure or sidewall flex. But if it works for you thats cool.

Personally I don't run anything less than 30 psi, I notice no flex with the Azenis but I have noticed tire clupping this year that I'm not happy with since it gives you uneven tread wear.

My theory on driving is I drive to the edge and if something on the car can't keep up I get something else to help.
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Old 09-08-2009, 03:27 AM
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Interesting, I am at work know but I will write my teory about it later after work.
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Old 09-08-2009, 03:32 AM
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Also I forgot to add I run a little bit of camber for the track also when I setup my suspension.

I'm interested to see your theory more in depth even though we both seem to have different driving styles.
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Old 09-09-2009, 12:22 AM
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i just got these wheels today for a price i couldnt say no, BBS 18x8 with michelin tires
Attached Thumbnails Track day tires for us euro guys!-476092cf98c42a4537e79f.jpg  

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Old 09-10-2009, 08:12 AM
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Whats the weight of them?

My new wheels got shipped out yesterday, now I need to go see when the painter can paint them.
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