Hi all, just wish to ask a quick question about my 2008 tire/wheel setup. Purpose of this setup is for up coming road racing/lapping season.

2007 setup:

Front (16K, setting #5 on the track <5 settings&gt - 225/45/15 RA1 + 15x7 +43 wheel (TE37 for reference)
Rear (14K, setting #5 on the track <5 settings&gt - 205/50/15 RA1 + 15x7 +43 wheel

2008 setup:

Front (16K, setting #5 on the track <5 settings&gt - 225/45/15 RA1 + 15x6.5 +35 wheel (SW388 for reference)
Rear (14K, setting #5 on the track <5 settings&gt - 205/50/15 RA1 + 15x7 +43 wheel

I am also thinking using one of these Wheel Adpater Spacer

I have been looking for reviews on this type of product, didn't find any (or perhaps I didn't search hard enough).

Going from +43 to +35 is an increase of 8mm, with another 25mm, that is 33mm wider than before. Perhaps like running a +10 offset wheel. I have known people mount 225 on 6.5 inch wheel but I have never driven that setup before myself.

The reason I didn't think about using the +35 on the rear is fear of rubbing. I ran +43 on the back and with the current drop, I could almost fit a finger in there on an angle. Roll the fender is an option, I suppose.

2007 season setup was nice, I liked it. Any advise on my 2008 plan would be greatly appreciated.

Thank you

 

Why would you put the wider tires on the narrower wheels?

 

I don't think that'll make much of a difference in anything. If you're really set on it, just uncomplicate that whole mess and roll the fenders while running a 10mm spacer on the front. You'd also need extended studs on the front, but BFD right?

No matter what, it seems to me like a step back to use a 6.5" wide wheel in the front just to get that offset.

 

wouldnt wider tires on a slimmer wheel create more sidewall flex?

 

True, true and true. It does seem like a step back, I guess I didn't want to experience rear quarter contact, but won't really know for sure until I put it on.

What is BFD?

That Ebay spacer has studs on it already, would it be a simpler solution to use extended studs?

 

Big expletiveing deal.

Would you trust ebay parts out on track?

 

haha, I see.

Aside from running wider front, I was wondering if pushing the front wheels out further, either by offset of spacers, would somewhat elevate the driving pleasure, hence using the +35 on the front.

 

Just as reference for you, I tried throwing 10mm spacers on the front of my car just for kicks. On the street I noticed a very minor difference. On track, I didn't notice it at all, and actually couldn't distinguish between sessions whether I had them on or not.

 

Thanks for the suggestion.

It is just that, I only have two +35 (6.5") and two +43 (7"). If I run the +35 in the rear, would wider rear end present a problem? Perhaps problem isn't the right word, unexpected cornering situation if you will?

I do have sets of 225 and 205.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Stinkycheezmonky &raquo;</TD></TR><TR><TD CLASS="quote">Just as reference for you, I tried throwing 10mm spacers on the front of my car just for kicks. On the street I noticed a very minor difference. On track, I didn't notice it at all, and actually couldn't distinguish between sessions whether I had them on or not.</TD></TR></TABLE>thats interesting. do you think that you couldnt tell the difference on the track because the tires masked it or because the car was at the limit?

 

Why dont you just buy two more 15x7" wheels and run 225/45/15 all the way around?

If it rubs then roll the fenders, raise the car or run more negative camber.

I like to be able to rotate the tires as tracks around the GTA seem to eat the left front tire of FWD cars.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Gunns &raquo;</TD></TR><TR><TD CLASS="quote">I like to be able to rotate the tires as tracks around the GTA seem to eat the left front tire of FWD cars. </TD></TR></TABLE>

That's true of tracks that are run clockwise, so they have more right turns than left turns. Most (not all, but most) of the road courses east of the Rockies are run clockwise. "Rovals" tend to run counterclockwise.

 

So you have two pairs of mismatched wheels. I'd personally just find another pair of whichever ones and use all of them. The 7" +43s are probably your better option, and you could always choose to run spacers if you wanted/it was needed.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thisisntjared &raquo;</TD></TR><TR><TD CLASS="quote">thats interesting. do you think that you couldnt tell the difference on the track because the tires masked it or because the car was at the limit?</TD></TR></TABLE>

I'm guessing because the car was at the limit, but I'm really not sure. I tried that with both street tires and R-comps, and noticed no difference between the two, as far as how much I noticed the spacers (crap, what a mouthful! )

 

+35 with 1.5 neg camber will not rub if you roll the fenders slightly. I ran +32 with them rolls slightly and they were FINE

 

Do you think you would have noticed a difference on track if you had adjusted all your suspension settings with the spacers on? Or had you already done that?

 

I made no changes, but I don't even know what I would've changed. At the time, camber was unadjustable, I wouldn't bother to mess with toe for any reason. It's possible that there could've been some better adjustment, but I wouldn't know where to begin.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Gunns &raquo;</TD></TR><TR><TD CLASS="quote">Why dont you just buy two more 15x7" wheels and run 225/45/15 all the way around?

If it rubs then roll the fenders, raise the car or run more negative camber.

I like to be able to rotate the tires as tracks around the GTA seem to eat the left front tire of FWD cars. </TD></TR></TABLE>

I used to run white/bronze TE37. Then I decided to sell the white ones because I want to try different offset. So I bought the +35 6.5" ones.

I do have rear negative camber due to adjustable coilover, as for how much, I do not know. Perhaps +35 at the rear with 205 tires should be fine. Afterall, I am running 14K spring rate at the rear. Shouldn't bounce all that much.

It is just funny thinking +43 in the front, and +35 in the rear. Unless, I run 205 all around with +35 in the front and +43 in the rear? 205 is still reasonable for 6.5".