It depends, here's my general rule

Start at 8" +30 in the front
Start at 9" +30 in the back

For every .5" more rim width, subtract 5 mm off the offset.

 

Well, my suspension is stock for now, but I plan on going with some TEIN Flex coilovers some time in the future. I'm probably going to go with 18x7.5 in the front instead of the 8.5's, just because I don't really want to roll the fenders or anything.

Also, Roen, sounds like a pretty good rule of thumb as long as it works!! I'll definately keep it in mind.

 

found something really helpful, here it is https://www.rsracing.com/tech-wheel.html#torque

 

would an 18x8.5 +37 in the front and 18x9.5 +35 in the rear fit my FC? front and rear fenders rolled...stock suspension for now, but want to upgrade with tokico and racing beat springs...thanks

 

nope, the fronts need to be pushed out with a spacer.
if they were 8" then you might be able to squeeze it in there but a 8.5 @ +37 will probably hit the strut body so you might want to run a 5 or 10mm spacer depending on your clearance inside at the strut body.

 

Did you try using my rule above?

 

so if i was to get like a...

18x7.5/+35 Front, should be ok right?
18x8.5/+35 Rear, roll the fenders and 5mm spacer?

is that how it goes? thanks man!

 

i wanna run 17x8+35 front and 17x9+ 35 in rear i want the to be flush and i would like to have slight strecth would i have to run spacers to make the flush or would these be perfect the way they are as far a clearane of suspension and flushness- pat

 

I don't think you need to roll the fenders or run a spacer, unless your tires are really wide.

 

Did you use my rule above?

 

http://www.rims-n-tires.com/rt_specs.jsp




here is a website that can demonstrate exactely what everything is,and does.

 

Ok so i have my car running and i can drive it. I got some AR outlaw rims in great condition for free. They are off a 280z. I got BF goodrich radial TA's. 235/60/14.
Look great on the car but i cant make large bumps, or hard turns because they scrape the fenders. They do stick out past the fenders. And i found the rims online and the off set i think is 0. 2 questions. Anyi can do to keep theses rims? On my car? And If not will the 235/60/14 be a issue with stock 4lugs rims? The rear seems pretty good but the suspension is uneven and one side has make a small amount of contact with the fender. New shocks in the rear take care of that? Let me know what you guys think there is so much to read on here so im gonna get back to that. Thanks

 

The offset is too low for that sort of tire size. Ideally you'd be closer to 30mm, there's nothing you can do short of a really serious fender pull or wide fenders that'll make them fit. Those tires are awfully wide for the stock rims, as they're 5.5" wide, those tires are 9.5" wide, although they do list that they'll fit onto a 6" rim, so you can probably make it fit, but it will be less than ideal.

If it's sagging then it's probably not the shock, the springs do sag over time, but you should check the top mounts and the bushings too.

 

roen yeah i did, and by that i would have to run a 30 offset but i have had buddys run +35 but you didnt answer my question about flushness, thats my question would i need a 5mm spacer to make flush with the fenders

 

you may need 5 mm spacers to be flush. You'd have to test.

 

thatas what im was afraid of, but from ur experiance what offset and width was flush

 

I wouldn't know, that's why I said, you'd have to test.

 

'91 Vert lowered with Eibach springs and KYB's.

I want to put a set of rims on that are:
17x8 +22
17x9 +26

I'd like to get the flush look but don't want to roll the fenders.

Will it work?

Thanks in advance for any feedback.

 

I'm not sure what is the offset on my wheels, but I have my 90 vert with 19x8 on 235/35s all around on stock suspension, doesn't rub or nothing. I'll try to find out the offset and I'll post it in the near future.

 

Added tires sizes in quote...

 

yes that will fit but will be close to the fender lips so you will need to roll them flat/flush at least.
nice setup.

 

dude this site is awesome! thanks man! i kinda have an idea how to figure out offsets and tire sizes now...kinda...lol

 

okay guys im trying to fit these 18 x 8.5 wheels on my turbo II. stock fenders looking to put 215/35 or 40 series up front and 235/35 or 40 series out back what type of offset am i looking at? Suspension in racing beat lowering springs with tockico shocks.

 

It depends, here's my general rule

Start at 8" +30 in the front
Start at 9" +30 in the back

For every .5" more rim width, subtract 5 mm off the offset.

 

Looking for a wheel with a DEEP lip. Something that will fit on a 245 rear tire.