Race Tire and wheel Question
Race Director
Joined: Jul 2007
Posts: 10,961
Likes: 2,643
From: Texas Hill Country
www.rimsntires.com
left side bottom link, wheel sizer. you can compare until you pass out
265/305 is the ticket
19x10 +56
19 or 20x11 +83
left side bottom link, wheel sizer. you can compare until you pass out
265/305 is the ticket
19x10 +56
19 or 20x11 +83
Last edited by Higgs Boson; Mar 21, 2015 at 09:01 PM.
Instructor
Joined: Dec 2013
Posts: 119
Likes: 10
B Stead,
I'm considering these wheels and offset for track use only.
9.0" width: +50 offset
10.5" width: +65 offset
- (2) 18x9.0 / (2) 19x10.5 TSW Nurburgring, Interlagos or Panorama
What are your thoughts on running a 265/35/18 and a 305/30/19.
There's a pretty good tire selection.
My primary concerns are - The wheels do not rub.
They do not Stick out past the fenders.
I could also run 255/35/18 and 295/30/19.
Can you give me your thoughts?
Thanks
I'm considering these wheels and offset for track use only.
9.0" width: +50 offset
10.5" width: +65 offset
- (2) 18x9.0 / (2) 19x10.5 TSW Nurburgring, Interlagos or Panorama
What are your thoughts on running a 265/35/18 and a 305/30/19.
There's a pretty good tire selection.
My primary concerns are - The wheels do not rub.
They do not Stick out past the fenders.
I could also run 255/35/18 and 295/30/19.
Can you give me your thoughts?
Thanks
Burning Brakes
Joined: Jan 2014
Posts: 1,078
Likes: 262
From: swoyersville pa
I haven't tried BRG's yet. Funny thing about the TC. After running the 18's a few times, it's no longer an issue. Car seems to have "learned".
The only rubbing is on the plastic air deflectors on the lower control arms. It carved a notch about 2" x 3". I cleaned it up a little with a box cutter. The Hoosiers are a little wider than the R888's & they also scrape a little on the inside edge of the brake cooling duct that comes in at the top of the wheel well. All of this rubbing occurs only at full lock. It doesn't seem to occur on the track.
I bought a set of 5mm wheel spacers, which seem to eliminate all of the rubbing. But they do bring the outside edge of the tires closer to the inside fender lip. I think it could be easily addressed with some more neg. camber, but I'm going to test the present setup with the spacers at an autocross next weekend. Still learning.
The only rubbing is on the plastic air deflectors on the lower control arms. It carved a notch about 2" x 3". I cleaned it up a little with a box cutter. The Hoosiers are a little wider than the R888's & they also scrape a little on the inside edge of the brake cooling duct that comes in at the top of the wheel well. All of this rubbing occurs only at full lock. It doesn't seem to occur on the track.
I bought a set of 5mm wheel spacers, which seem to eliminate all of the rubbing. But they do bring the outside edge of the tires closer to the inside fender lip. I think it could be easily addressed with some more neg. camber, but I'm going to test the present setup with the spacers at an autocross next weekend. Still learning.
Burning Brakes
Joined: Mar 2013
Posts: 896
Likes: 38
From: Camarillo California
im happy your TC learned? the 18's, i was just going to inbox you and say the car does not know wheel size but overall tire size. last season i ran 315/35/17's( yes 17's) on the front of my base c7 with 315/30/18 out back, the fronts are 1/10 of a inch taller than the rear, when i ordered then i thought they were same height, NO! anyway one ride around the block and nannies were gone for good. f.y.i i just inbox looking for the 2nd set of wheels you did not buy, 18's fit/work fine on z51
https://www.corvetteforum.com/forums...s-sensors.html
Race Director
Joined: Jul 2007
Posts: 10,961
Likes: 2,643
From: Texas Hill Country
B Stead,
I'm considering these wheels and offset for track use only.
9.0" width: +50 offset
10.5" width: +65 offset
- (2) 18x9.0 / (2) 19x10.5 TSW Nurburgring, Interlagos or Panorama
What are your thoughts on running a 265/35/18 and a 305/30/19.
There's a pretty good tire selection.
My primary concerns are - The wheels do not rub.
They do not Stick out past the fenders.
I could also run 255/35/18 and 295/30/19.
Can you give me your thoughts?
Thanks
I'm considering these wheels and offset for track use only.
9.0" width: +50 offset
10.5" width: +65 offset
- (2) 18x9.0 / (2) 19x10.5 TSW Nurburgring, Interlagos or Panorama
What are your thoughts on running a 265/35/18 and a 305/30/19.
There's a pretty good tire selection.
My primary concerns are - The wheels do not rub.
They do not Stick out past the fenders.
I could also run 255/35/18 and 295/30/19.
Can you give me your thoughts?
Thanks
Burning Brakes
Joined: Sep 2011
Posts: 960
Likes: 40
The C7 OEM 285 rear tires are flush at 65mm offset.
And so:
285 rear tire at 65mm wheel offset
295 rear tire at 70mm wheel offset
305 rear tire at 75mm wheel offset
315 rear tire at 79mm wheel offset
It does happen that the inside clearance is not much of a problem. But if the rear wheel offset is more inward than 79mm that reduces vehicle track width
.
Last edited by B Stead; Mar 22, 2015 at 11:59 PM.
Instructor
Joined: Dec 2013
Posts: 119
Likes: 10
The C7 OEM 285 rear tires are flush at 65mm offset.
And so:
285 rear tire at 65mm wheel offset
295 rear tire at 70mm wheel offset
305 rear tire at 75mm wheel offset
315 rear tire at 79mm wheel offset
It does happen that the inside clearance is not much of a problem. But if the rear wheel offset is more inward than 79mm that reduces vehicle track width
.
And so:
285 rear tire at 65mm wheel offset
295 rear tire at 70mm wheel offset
305 rear tire at 75mm wheel offset
315 rear tire at 79mm wheel offset
It does happen that the inside clearance is not much of a problem. But if the rear wheel offset is more inward than 79mm that reduces vehicle track width
.
I have been looking, but continue to strike out with the exception of wheels in the $4,000 range or 3 piece which are a pain to maintain.
Ken
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Burning Brakes
Joined: Sep 2011
Posts: 960
Likes: 40
The Cray 2014 line has the 9.5" wide front wheels and the 11" wide rear wheels. The 18" front diameter is said not to work on a Z51 but 19/19 could work.
The Forgestar CF5 can be configured as :
Front, 19 x 10, 56mm
Rear, 20 x 11, 79mm
Find the sizes on the Forgestar website and price them on the Howey Industries webstite.
My Superleggera III trick is like this:
Front, 18 x 9.5, 59mm, use 3mm spacer, listed under the C5
Front, 19 x 9.5, 59mm, use 3mm spacer, listed under the C5
Rear, 19 x 11, 75mm, listed under the C6
Those are about $900 each and often in stock at TR.
Finspeed is on the forums with custom wheels at $895 each but options make them more like $1200. Those are one-piece forged wheels with a lot of machining
.
Last edited by B Stead; Mar 24, 2015 at 02:37 PM.
Drifting
Joined: May 2007
Posts: 1,546
Likes: 30
From: WENTZVILLE MO
Loved the C7 Zo6 set up. What do you have for C7 Z51 to drop down to an 18" wheel?