From 17 to 18 in Wheels - changes???
Thread Starter
Rennlist Member
Joined: Jul 2003
Posts: 1,964
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From: Peachtree City, Ga
From 17 to 18 in Wheels - changes???
Am making the switch from 17 to 18. Received the 18's toady - OZ Alleggerita HTL with Toyo R888 - Frt 235/40/18 and Rear 265/35/18. First thing I noticed was that the R888 are a little taller than the 17 Hoosiers I run Frt dif is a 23.8 dia vs a 25.5 (R888) and the rear is 24.8 vs 25.4 (R888) - widths are very close to being the same in section and tread frt 9.8/8.9 vs 9.6 /9.0 and rear at 10.2/10 vs 10.8/ 10 - tread width is basically the same.
For me it looks like I am going to have to lower the front ( 1 3/4 inch difference). So I need to drop at lease 3/4 inch or more to get back to the level I am was at with the 17's and drop the rear a little 0.3 inch. I know I have this in the rear, but believe I am as low as I can go on the front without changing springs again.
Just wondering for those of you that have made the switch from 17 to 18 - What differences have you run into and what suspension adjustments have you had to make.
For me it looks like I am going to have to lower the front ( 1 3/4 inch difference). So I need to drop at lease 3/4 inch or more to get back to the level I am was at with the 17's and drop the rear a little 0.3 inch. I know I have this in the rear, but believe I am as low as I can go on the front without changing springs again.
Just wondering for those of you that have made the switch from 17 to 18 - What differences have you run into and what suspension adjustments have you had to make.
Racer
Joined: Jun 2011
Posts: 491
Likes: 20
From: Danbury, CT
Although this has nothing to do with ride height; with the switch to 18s you may also consider the steering rack brace. You have a few options for that brace - original 993, RL'er Peter (chaoscreature), or Rothsport.
Racer
Joined: Jun 2012
Posts: 439
Likes: 3
From: Manchester, England
From 17 to 18 - what's the largest size for a narrow body?
Does anyone know what the largest wheels you can get on a narrow body c4 without messing about with fenders etc...
I am looking at speedline split rims 18's front 9" and rear 11" will they fit?
TIA
Steve
I am looking at speedline split rims 18's front 9" and rear 11" will they fit?
TIA
Steve
Racer
Joined: Jun 2011
Posts: 491
Likes: 20
From: Danbury, CT
SML and Bill Verburg have many posts on this topic - quite informative ones on the fit of various wheel sizes. NB with the widths you are mentioning is unlikely without rolling or cutting the fender lips. Offsets and camber become critical too.
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Thread Starter
Rennlist Member
Joined: Jul 2003
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From: Peachtree City, Ga
9 front and 11 rears are too big - the sectional width of the tire would be too great. Frt at 8 is safe and rear at 9 is safe- 10 very questionable, as the next question is what size tire are you mounting and what would the sectionla width be. Even then (depending on spacers) you will need to roll the inside fender lip up. The stock lip sticks out on the inside and will cut into the tire on hard cornering or major bumps.
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Instructor
Joined: Sep 2011
Posts: 227
Likes: 1
From: Dubai & Munich
hi jotaking,
i changed over to 18s on a narrow body carrera 2, mine are 9.5 in the rear, messing with the fenders will depend on how u wanna go and tires...
i had to... expensive but worth it.
pirellis have a more contoured round edge, i havent tried them personally as i run continentals. but this was on more than a thread here in rennlist. hope this was helpful.
i changed over to 18s on a narrow body carrera 2, mine are 9.5 in the rear, messing with the fenders will depend on how u wanna go and tires...
i had to... expensive but worth it.
pirellis have a more contoured round edge, i havent tried them personally as i run continentals. but this was on more than a thread here in rennlist. hope this was helpful.
Three Wheelin'
Joined: May 2010
Posts: 1,564
Likes: 1
Three Wheelin'
Joined: May 2010
Posts: 1,564
Likes: 1
10 very questionable, as the next question is what size tire are you mounting and what would the sectionla width be. Even then (depending on spacers) you will need to roll the inside fender lip up. The stock lip sticks out on the inside and will cut into the tire on hard cornering or major bumps.
Thread Starter
Rennlist Member
Joined: Jul 2003
Posts: 1,964
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From: Peachtree City, Ga
Three Wheelin'
Joined: May 2010
Posts: 1,564
Likes: 1
See recent comments posted -
https://rennlist.com/forums/964-foru...tri-state.html
https://rennlist.com/forums/964-foru...tri-state.html
10ET44 to 10ET47 is the sweet spot with max neg camber for no mods .
search the threads for the guy with the 11" to find out the perfect camber and offset.