No one ever really agrees with my wheel fitments so I try to refrain from commenting in public anymore. In my opinion the 235/295 stagger is too much to be overcome with suspension adjustment. Not to mention the lack of grip on the front end. I'd go with an 18" wheel up frotn and get the 265 or 275.

 

Thanks for the insight. Ill have to see if I can get the wheels I want in different sizes.

 

a 235 on the front with a 295 on the rear? woah man.

 

I wasn't speaking of aesthetics. I was speaking of handling characteristics of an over-sized tread compared to the rim size. If you are fitting it onto the smallest recommended rim width, I always thought that this setup caused sloppiness in the tire.

You are working with some great guys I think (Champion) and I am sure you discussed all of that, I was just surprised. But no rim bead protection would make up for that tread size

speaking of that, who developed your suspension setup? did you have help picking tire sizes and ride heights and all of that or was this all by yourself?

 

Perfect setup for 1/4-mile drag racing . . .

 

I have no slop induced by the tire/rim combination. The R888 has a very stiff sidewall. The car reacts instantly and precisely to steering wheel inputs. There was no change in feel moving from a 295/30/19 on a 10" wheel to a 305/35/18 on a 10" wheel.

I set up my own suspension. Alot of it was done by trial and error on the track. Suspension geometry was calculated on a computer program. While the front roll center isn't ideal right now it's a good compromise that I can live with until I install some roll center adjusters that work.

I didn't have the money to custom order a set of $4000 wheels which is what this car needs. Perfect situation would be a 12" +35 for the rear which no one manufactures. An 11" +35 would b a compromise, but no one makes that either. This was my only option and I'm very happy with it.

Pictures are pictures. Seeing the car in person is a different story. The tires don't bulge that much. The tire is a racing tire and has a very wide/round shoulder. If you have a 305 summer tire that had minimal clearance and installed these R888's they would never fit. All sizes of R888's are very wide for their measured tread width.

 

didn't moonface just put out some fairly cheap roll center adjusters?

 

You call $500 cheap?!?! No one seems to know how these work. I am waiting for a response from Adam @ Z1Auto. He was supposed to be in contact with Moonface to get an explanation. My suspension program says there is no way they can work. Still waiting for a response. Jury is out on that. Maybe there is something I am missing.

 

is there an alternative way to achieve a change in the roll center on a lowered car?

if could you fabricate/modify something, what would the cost be?

 

Jet, no issues with slight rubbing from sidewall flex under high lateral loads?

Thanks for sharing your setup, btw.

 

No... there is no rubbing whatsoever on the inside or outside. I had this setup on the track @ Sebring already. Perfect fit!

 

I have seen this setup in person. The car looks incredible!!

But the best part is the blue lugnut in each wheel. Now I have to do it to mine!!

 

Only thing I don't like is how thick the sidewall is. The R888 is a great tire, but when are tire companies going to learn to make more sizes????

The 305/35 is too thick IMO, but a 30 series would be nice. Then they have the 285/30 and 295/30 which would be amazing in a 35 series.

Maybe im too picky but a 265/35f and 285/35r would be an amazing setup. I have had it with the REO1A's. Sticky tire, but the sidewalls were MUSH and felt very unstable. The handling was great though, no oversteer or understeer.

Guess i'll just have to go 275/35f and 295/35r Kuhmo MX. I think the 295/35 is boarderline thick, but it'll do.

Sorry about the mini rant, love the tire, just wish there were more sizes available.

 

Thanks Miguel! You can run a single blue lug nut if you want.... BUT NEVER tell people why I do it!

The 275/35/18 F 305/35/18 R are the exact OEM tire diameter. It was perfect for me becasue I think those little donut tires that are smaller than OE diameter look rediculous with big wheel wells. I wanted OEM diameter.

This a a car that only sees the track so.... I don't care about the looks. But in my opinion it looks hot as hell. It's got a racecar look. No one who is serious runs 19's on the track.

With 565 whp I don't want to change the gear ratio with smaller tires making traction even worse.

 

Thanks!