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Anyone with a square 18" wheel setup on their base car? I'm looking to go square possibly but interested to see what width wheel I can run with what size tire. I've heard of 19 x 9.5 fitting up front so curious to see if 18x10 would work on a square setup?
I would be interested in this as well for a road racing / track / HPDE application. I have had this same question for a while, but not researched seriously enough to come to any kind of conclusion.
Maybe someone in this section would have an answer for us... https://www.corvetteforum.com/forums...roadracing-23/
If you're considering the same sized tire/wheel combo on all four corners, you'll need to turn off all of the nannies all of the time. Plus, it's going to ride low in the rear relative to the front. No matter the rim size, I'd still try to maintain the stock front to rear diameter ratio.
Those C5Z 10.5s up front seem to stick out quite a bit. I wonder what the offsets were on those TSW's. Hard to tell since its a distant photo but the car seems to be relatively low and the tire looks like its inside the wheel well.
10.5 w/ 295's would be great. Really dont want to spend the money on an OEM widebody but it seems that may be the best option to run a nice sized square setup.
Those C5Z 10.5s up front seem to stick out quite a bit. I wonder what the offsets were on those TSW's. Hard to tell since its a distant photo but the car seems to be relatively low and the tire looks like its inside the wheel well.
10.5 w/ 295's would be great. Really dont want to spend the money on an OEM widebody but it seems that may be the best option to run a nice sized square setup.
I think those wheels only come in one offset for the vette in 18 and their 65.
Anyone with a square 18" wheel setup on their base car? I'm looking to go square possibly but interested to see what width wheel I can run with what size tire. I've heard of 19 x 9.5 fitting up front so curious to see if 18x10 would work on a square setup?
Meatier than expected. The fear sets in they wont fit. Difference in rear Bridgestone RE11s 285 series to Toyo RRs 315 series. Toyos are substantially shorter front and rear. Rear test fit. Inside lip looks like it won't clear without cutting, but does on the ground. Test fit front. Same concerns but it works on the ground. On the ground. Front actually tucks in a bit, rears are jjuusstt out a bit from flush (Don't care.). Pardon the dust! Rear quarter view. Booty.
So I'm going to go ahead and bring this back from the dead from earlier this year, so all information is in one place. I've been referencing this thread heavily and a couple other older ones for the last few weeks IOT get ready for Auto Club Speedway Roval Nov 4th/track days. Basically put all my faith in the forum and it worked out great so far with no real clearance issues. No rubbing although it was just an easy drive on it so far.
TSW Nurburging or Interlagos will work. 18X10.5 65et all around.
The Toyo Proxes RR will work fine. 295 30 18 fronts, 315 30 18 rears. You could go 295 all around for tire rotation purposes.
Alignment is done and super conservative right now PFADT street specs, but plan on at least -1.7f, -1.0r camber without issue and go from there.
Car is a base body 2005 C6 with F55 stock suspension. My inner fenders were/are the worst, and I thought I'd need spacers or maybe even cut into them; not the case. They have been chopped a bit for boost etc on the bottom but that has only made them worse. I took lots of pics for you guys since there's only like, ONE decent picture on the forum that I put all my faith and trust in. Now no one else will have to lose sleep while waiting on their shipments from amazon and tirerack!
Last edited by Sarge5052; Oct 26, 2018 at 09:55 PM.
Yes you can run 18 square on 10.5 speedline rims. Ive used both 315 and 295 with this setup. The 315 size is faster. If your going to order custom rims get 18x11 with the proper offsets.
I ran the 18x10.5 TSWs on the rear of my C6 track car and they stuck out just enough for the outside of the tire to touch the inner fender when the suspension was compressed on the race track. Just check your rear inner fender for rubber at the end of your day at the track to be sure you're ok.
More pics of front please - how much does it stick out?
Can we have pics of the front.
Originally Posted by Sarge5052
Meatier than expected. The fear sets in they wont fit. Difference in rear Bridgestone RE11s 285 series to Toyo RRs 315 series. Toyos are substantially shorter front and rear. Rear test fit. Inside lip looks like it won't clear without cutting, but does on the ground. Test fit front. Same concerns but it works on the ground. On the ground. Front actually tucks in a bit, rears are jjuusstt out a bit from flush (Don't care.). Pardon the dust! Rear quarter view. Booty.
So I'm going to go ahead and bring this back from the dead from earlier this year, so all information is in one place. I've been referencing this thread heavily and a couple other older ones for the last few weeks IOT get ready for Auto Club Speedway Roval Nov 4th/track days. Basically put all my faith in the forum and it worked out great so far with no real clearance issues. No rubbing although it was just an easy drive on it so far.
TSW Nurburging or Interlagos will work. 18X10.5 65et all around.
The Toyo Proxes RR will work fine. 295 30 18 fronts, 315 30 18 rears. You could go 295 all around for tire rotation purposes.
Alignment is done and super conservative right now PFADT street specs, but plan on at least -1.7f, -1.0r camber without issue and go from there.
Car is a base body 2005 C6 with F55 stock suspension. My inner fenders were/are the worst, and I thought I'd need spacers or maybe even cut into them; not the case. They have been chopped a bit for boost etc on the bottom but that has only made them worse. I took lots of pics for you guys since there's only like, ONE decent picture on the forum that I put all my faith and trust in. Now no one else will have to lose sleep while waiting on their shipments from amazon and tirerack!
Front pics from last weekend. Fronts don't stick out and if you have camber plates the rears won't really stick out either (but near stock camber in pics).
Fitment on stock shocks.
I had this vision of 18 x 11 on all 4 corners with help from the wider front fenders from Supervettes (adds 1.5" per fender over a wide-body C6, if memory serves) on a C6 Grand Sport, but offsets become an issue (I'm a wheel sizing idiot and have no idea what I'm doing when it comes to fitment). Who knows where this wild-hairbrained-scheme will end up...
start with known rims then go from there. The calculations are easy, but I prefer seeing what works, then adding width inside/outside once I know for sure.
I have Z06/GS rims and a set of CCW's also, even some base wheels laying around. Always pretty easy to find a starting point.
18" square setup
