Is anyone running a 8.5" x 18 front wheel?
#1
Is anyone running a 8.5" x 18 front wheel?
The reason I ask is I have changed the front width wheel size on the car, but I'm a little bit concerned I have issues with different rolling diameters as I have a the Tiptronic 996 Turbo.
The new width is 8.5" compaired to 8" (rears are still same) but my new front tire size will have to be a 255/35/18 compaired to 225/40/18 does anyone know if this is ok to run alongside the stock rear size?
The new width is 8.5" compaired to 8" (rears are still same) but my new front tire size will have to be a 255/35/18 compaired to 225/40/18 does anyone know if this is ok to run alongside the stock rear size?
#4
I have 8.5 fronts with 245/40/18 (RA1s) which have a little taller sidewall than most. There was somve very minor rubbing when approaching lock. The seem to be 'seated' now. ![Embarrassment](https://www.6speedonline.com/forums/images/smilies/redface.gif)
I think you will rub like crazy with 255s.
Mike
![Embarrassment](https://www.6speedonline.com/forums/images/smilies/redface.gif)
I think you will rub like crazy with 255s.
Mike
#5
Mike, I think I would be in transmission trouble if I run 245's as the sidewall figure works as a percentage of the width of the tire and because i'm a Tiptronic. Even if I go for a Rolling Road (Dyno) It has to be mechanical linked, running in sequence or I will burn up tranny. The correct figure (closest to stock) would be 255/35/18, dropping the sidewall height but increasing the width slightly. Agree possible rubbing issue, but don't know how much.
#6
The car gives you 4-5% tollerance in OD before issues start to arrise. Stay 225 or 235 on the front. Anything wider than 235 on on 8.5" doesn't give you anything back in street performance. I can't see how a 255 will fit and not rub under any circumstance and will need at least an 8.5" rim to fit. 9"+ is more ideal.
__________________
damon@tirerack.com
877-522-8473 ext. 4643
574-287-2345 ext. 4643
**Don't forget to add my name to online orders!**
Or use this link:
http://www.tirerack.com/a.jsp?a=BH1&url=index.jsp
damon@tirerack.com
877-522-8473 ext. 4643
574-287-2345 ext. 4643
**Don't forget to add my name to online orders!**
Or use this link:
http://www.tirerack.com/a.jsp?a=BH1&url=index.jsp
Last edited by damon@tirerack; 11-02-2007 at 07:32 AM.
#7
The car gives you 4-5% tollerance in OD before issues start to arrise. Stay 225 or 235 on the front. Anything wider than 235 on on 8.5" doesn't give you anything back in street performance. I can't see how a 255 will fit and not rub under any circumstance and will need at least an 8.5" rim to fit. 9"+ is more ideal.
I have a new set of wheels which are 8.5" front with 11" rear so the choice was to either go 255/35/18 fronts to stay inline with the 295/30/18 which would be fine but possible rubbing issue, so safest option is to go 235/40/18 for fronts and increase rears to a 315/30/18, this way it should all be safe regarding rubbing and rotation.
lol, hope that all made sense, lol
Trending Topics
#11
Stevo, what are you trying to achieve? Reduced understeer? If so, perhaps there is an easier solution, like putting an adjustable GT3 sway bar on the back and tightening it up. They are pretty cheap too.
Thread
Thread Starter
Forum
Replies
Last Post
COBB Tuning
Automotive Parts & Accessories For Sale/Wanted
5
11-09-2015 08:02 PM
ModBargains
Tesla Motors Vendor Classifieds
0
08-20-2015 12:28 PM
Yotam Refael
Cayenne
0
08-18-2015 03:03 PM