He has his opinion, I have my opinon.

Sorry if you can't deal.

 

Ok there opinion boy, have you driven a WRX with 255/40/17 all around?

Or better yet, have you driven a same car, with:

215/45/17
225/45/17
235/40/17
245/40/17
255/40/17

and even

225/45/17 front on 7.5"
255/45/17 rear on 8.5"

Because I did. In one weekend. And my opinion comes from real life experience. It is my opinion. Not a fact. But, I did not just pull out it of my rear end.

Where does your "opinion" come on driving on wider than normal tires?

 

Do you have official stats that the Subaru WRC impreza in tarmac trim doesn't run wider than 255?

So you think all these autox and open track guys that run wide tires are doing it for nothing?

I know wider tires kill turn-in response, but the added grip *IMO* outweighs that.

I've driven a STi with 255's. Didn't feel bad on turn-in and had a boatload more grip. *IMO* heavier awd cars that are 3200lb+ (like the STi) benefit alot by more tire.

I've driven an evo with 265's and it had extremely more grip than with the factory 235 tires.

Those are my opinons from driving cars with wider than normal tires.

I hear all the time when cars are running race classes that prohibit running wider tires, like stock class SCCA, the thing that kills heavier cars is if they can or cannot run wider tires or came with skinnier tires from the factory. The one big reason M3's do so well in SCCA is that they can fit much wider tires without having to do any prohibited body mods.

 

Ok, that is an opinion. Not just verbal deareah like I though it was.

Let me get the specs on the WRC car. I had it somewhere. I will find it and post it.

So with you theory, would it be good to slap on some 305's then? I mean where do you stop? When the power the car has is not sufficient to take advantage of more grip, it becomes silly a.ka. pointless.

Are there really that many auto-x's STi's that run 275's?

And on the EVO subject. The fastest Time Attack EVO in Japan, Cyber EVO, runs 245's. The fastest US Time Attack EVO (BOZZ Performance) also runs 245's.

 

yea I was actually looking for the WRX Tarmac specs but couldn't find it. I was sifting through the FIA Rules to see if they are prohibited to run a certain size tire but all I could find so far is the maxiumum wheels diameter is 18". I can't find article 801.b

Wheels and tyres 6.4.1) Wheels: The wheels are free, respecting the homologated maximum diameter (article 801.a), and maximum width (article 801.b). The diameter of the rim is free but may not exceed 18".

Tyres: Tyres are free provided that they can be mounted on those wheels.

Which time attack are you talking about? Last I heard in SCC Time Attack the Sparco EVO was the fastest USA EVO, then the Buschur Racing EVO, then the XS Tuning.
These are 245's? ***Nevermind, this was the first time attack, I can't find the standings from the 2nd***



According to the cyberevo site they are: ADVAN A048iS 255/40-17

http://www6.plala.or.jp/cyberevo/democar/index.html

 

who said I cant deal? I was just pointing out the obvious.

 

Oh, sorry, yeah Cyber EVO runs 255's. We (BOZZ) run 245's. Cyber EVO makes over 600WHP and they still run 255's. BOZZ EVO makes 420 WHP and we run 245's.

The second TimeAttack at Buttonwillow, BOZZ got 2nd overall (after Cyber EVO) and 1st in AWD Class (Limited, but were still faster than AWD Unlimited).

The third TimeAttack at JGTC in LA, we got 1st overall.

Anyways, no argument here. I gave you mine reasoning, you gave me yours. Lets leave it at that, grasshopper.

 

Oh yeah, I forgot to metion something very important.

To run 275's, in the rear, you will have major rubbage on the shock. Even the coilovers. So, to get that to clear, you will need to run at least a 9 rim or even a 9.5 inch wheel. To get that wide of a wheel to clear the shock, you will need 32-38mm offset. And with that low of an offset, WRX's handle like ****.

With 235/45/17 on 17x7.5' +38 wheel, my car handled worse than stock during the SCC shootout back in 2001.

 

some good info in this thread

 

I think it would depend on the track your running at as to which tire size may suit better, for short twisty track where car turn in and rotation would be needed perhaps a skinner tire. For a long fast track with sweepers and so on then the added contact patch would out weigh the turn in losses.

In any case most of the rotation and turn in response for the above mentioned super cars should be able to be tuned in and out using proper alignment settings (anyone for Toe!)

I am going to run 255's on my WRX as well as on my L but would probably run 275's on the WRX if I could.

Mike

 

UH OH!

 

the comparison 265/35/18 > 225/40/18

 

This is going on Geoff from CTIs car, they are 18X10 (yes, TEN!!!) BBS rs-gts, yes they will fit without body modifactions, stay tuned!

 

WTF, are those like 1/2" spacers!??!?!

 

yes, and adapter from 5X100 to 5X114, no one makes 18X10s in 5X100