hey guys, i have an 88 iroc with 16" rims and i want some nice sized meats on them. ive been looking at all the possiblities for aftermarket rims and did a ton of searches. but ive come to realize that i like the look of my rims. but all the replicas i found are 17,18,19,and 20 and still only 8 inches wide. does anyone know of a company that offers an iroc style wheel but in a 17x9 or 9.5-10? any help would be appritiated. thanks oh and i forgot to add, a rim that doesnt require spacers of body modifications. offset and backspasing can change.

 

There is currently no such wheel being produced. We all have looked, and we will all continue to look. You WILL KNOW when someone makes 'em, but don't hold your breath.

 

You can always have the stock wheels widened. It may cost a bit much but you'll have exactly the wheels you want.

Ed

 

That was my intention but no tires to fit a 16x9 rim like a 265/45-16 or a 275/45-16. I'd still be using the same 245/50-16.

I like my '87 Iroc rims and will just keep the rims and tires I have on it (they were not stock- Its an RS)

 

alright i guess ill have to get new rims then i dont want to alter the origanal rims because then the offset and backspacing wont be changed to compensate for the wider rim. thanks guys.

 

Is that necessary? The face of the rim will still be in the same spot under the fender.

 

Why can't you just run a 1" or so spacer to keep it centered so to speak?

 

well the face would be inthe same spot yes but the rear lip of the rim would be farther back and i dont want to run any spacers. also it would throw of the way that the wieght of the vehicle is ditributed across the tire surface.

 

How do you figure that?

 

if you widen the rim one side or the other has to move out farther from the car or move farther in twards the wheel well. if it is not wideened evenly on both sides the vehicles wieght would be offset to one side and therfore cause more pressure to one side of the tire.

 

No, it won't make any difference to the distribution of the weight across the tires. The only thing that could change that would be relocating the center of gravity of the car left or right.

 

Actually everyone he does make a good point about load distribution. However its not the tire load that matters, its the load change the inner and outer wheel bearing take.

If the offset of the tire is dramatically off the leverage of the tire on the wheel bearings will cause either the inner or outer to increase load and burn up due to excess heat- based on which way (inboard or outboard) the scrub radius is positioned from factory engineering.

Now by widening the tire equally inner and outer while retaining the factory scrub will not change the load (basically) in comparison to running more negative offset. Alignment (mostly camber) will have an affect on this also based on the tire running more on the inner edge straightline and then shifting to the outer edge on hard cornering. Most wheelbearing burnups are in relation to unbalanced even load distribution on the inner and outer bearings to cross distribute the load patterns evenly and effectively during a race.

Basically to explain this in english-

The outer wheel bearing will load downward and the inner will load upward on the front of our cars when stagnant weight of the car is resting on them. Cornering forces on the bottom edge of the outer track front tire will flip-flop to cause the outer bearing to load upward and the inner to load downward.

I have setup my custom front hub offset assembly (alum hubs for bearing cooling) with hubcentric spacers that just slightly set me outward (positive) more to compensate for the -1* camber I run and the lack of flex in the solid strutmounts and the rest of the chassis under load. I feel that the extra 1mm helps compensate for what I have done to this car and keeps a happy medium- Its really not this crutial unless you all out race the car and produce excessive heat, but since I had the option and the knowhow I build it to where I thought it would slightly benefit me.

"Being fast for one block or one corner is fine, but try that for a duration and see how your fast car will hold up". I build my cars to last- ever see a police chase and how cars fall apart when abused, tires heatup and delaminate, brakes overheat, cooling system goes to hell, in an hours chase something generally goes haywire- not on my cars because I build them for reliability first.

 

hey thanks guy, thats what i was trying to spit out. i knew there was a term for it and couldnt think of it......scrub radius. and i realise that the only way to keep it the same is to widen it the same of both sides but then i would probably run into clearance issues on the inboard side. and i dont want to run spacers. thanks again guy.