Good to know! i am a law student... i thought you were into the automotive industry considering what you did on hondas !

 

I know alittle bit about how cars work

 

The engineers at Toyo says 235/25,4 is optimal in rim wide.

 

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

 

If you have access to some good machines we might talk about something fun to do!

 

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).

 

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?

 

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!

 

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.

 

Too bad, i have some housings and irons to play with but cnc machining is expensive here!

 

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,,,,

 

I wouldn't run 7.5's on an Rx8 its comes with 8" wide rims stock

 

thats the only one i got , the seller didnt have stock rims...

 

buy stuttgart's ultraleggeras!

 

i have been running on these for 1.5 years and drag race on 6 race wars events. i might buy yours

 

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.

 

R888s always do that. just wait and then get some advan a048 for comparison!

 

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.

 

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

 

a048 is road legal, I will check out camskill.

 

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.

 

Interesting, I am at work know but I will write my teory about it later after work.

 

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.

 

i just got these wheels today for a price i couldnt say no, BBS 18x8 with michelin tires

 

Whats the weight of them?

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