Judging by my 17x8 RPF1's in a 35mm offset,There is no way I could see fitting 17x9's in the same offset in the front of the FC.Those 17x8's won't even work with ground-control coilovers without a spacer,you need closer to a +30 offset because the collar interferes with the rim as opposed to the tire.To fit a 17x9 with 255/40R17's you would need at least a +20mm offset and probably a +15mm offset depending on the coilover and also how"blocky" the tire is in that size without hitting either the coilover collar or spring.I'm pretty sure RisingArizona was using 17x8.5-40 offset rims with a 225/45R17tire in the front with tein "flex" coilovers,but I take it those coilovers are a little narrower or with the double adustment the collar doesn't sit at the rim lip,but I'm just guessing.Maybe he'll chime in.The 17x10-18mm offset are going to need a very generous fender rolling to work in the rears also.

 

ya 17x10 -18 will need a big roll but it is worth it.

I have test fit some 17x9 +35 i have they fit but looked unflush so i bought some 35mm spacers for it...

 

hey would 18x8.0 +48 5hx120 fit on the fc ?

 

no,
A: because its the wrong bolt pattren..
B: It would probly rub cause the offset it so shitty..

 

Because Of A Decent Xmas Bonus I Have Changed My Mind On Rims And Now Am Looking To Get Volk Ce28n's

My Question Is I Was Recommended To Get 17x8 Et 32 In The Front And 17x9 Et 32 In The Back.

I Was Looking On Running 225's Front And 245's Rear

Will There Be Any Problems With This Set Up

Thanks,
Randy

 

whats the fc 5 lug pattern? ?

 

the search button is on top of the page!

 

Good for you!

That should fit no problem.
I would go 255/40/17 in the back though - the 255 looks nicer on the 9" wide, IMO.


-Ted

 

I feel nice today.

5 x 114.3mm or 5 x 4.5"


-Ted

 

255's on a +35mm 17 x 9 up front? no way. Not on stock fenders

255-on a +18mm 17 x 10 rear? Not a chance. and why would you wanna run a 255 on a 10"?

I would run this:

17 x 8 +35mm 225-45
17 x 9 + 35mm 255-40

I'm not sure if the 8" on F1's are +35mm, but with those JIC's a 235 won't fit...

 

raising arizona, do you know how much backspacing the 9.5 wide 18mm offset rpf1 wheels have? and if it will fit with the tein flexs up front? and how tight it will be if it does.

 

thanks a lot ted!

-randy

 

Back spacing, Not 100% sure with that +18mm offset. The issue will be the wheels and tyres rub'n the outer fender.

Coilovers on these cars are a tight fit. The sizes I gave above were RPF1 specific. If I were you and wanted to run Flex's, try this

17 x 8 +35 to 32mm and you might get away with a 235 tyre.

17 x 9 +32 to +27mm w/ 255 tyre. If your going to run a 10" wide wheel I'd say a + 32mm - +30mm is about going to be your only fitment. No I could be a little off there and I know Rishie could answer this exactly. But +18mm isn't gonna fly on stock fenders. Unless your making 400 plus rwhp a 10" isn't needed.

 

You can calculate approximate backspacing...

Rim width divide by two and then add the offset.

Thus, 9.5" / 2 + 18mm.
This is about 4.75" + ~ 3/4" or about ~5.5".

Some lip profiles can stick out a lot - offset doesn't take into account the lip profile, so I'd add another 1/4" just to be safe.

This means your 9.5" +18mm offset is approximately 5.75" of backspacing...


-Ted

 

the reason i am so concerned is that i now have a 17x8 99-01 mustang gt wheel which is 31 offset and its less then 1cm away from the coilover. the 9.5 inch wheel and 18mm offset would be 6 more mm inside which means it will be VERY tight considerign the lip is lip rim is about as wide as the mustang wheel. this is infact the biggest reason i am not getting 10 inch wheel all around, and it would prolly start to stick out even with a 20mm wider front fender?

what raising arisona gives for offset and wheel width and offset seems impossible to work? arisona are u running spacer that u forgot about

 

how does that 17x8 look to the fender? can you take a pic looking down the side of the car to show how the tire sits with the fender? to see how far in or out it sits. i was thinking a 17x8 +38 would be about perfect. but that's just on paper. i need to see what your +31 looks like to get a better idea.

 

I was gonna ask if you had Stang rims because of those offsets. Ted's right on the back spacing. I got most of my measurements from John @ CCW. He made wheels wide like your widths so he knows exactly what will work. I don't think the +18mm will work with oem fenders.

I used a spacer with my 17 x 9.5 +38mm making it +33mm and it worked great. I also used a 5mm spacer up from 17 x 8.5 +40mm making it +35mm offset and with 1deg NEG they didn't stick out and with RA's it was tight.... I think the RA's diameter on the coil is smaller that of the Flex's

I can try posting a photo or email me

 

Hi All,

A misunderstanding has some wheels coming my way that I'm worried won't fit. I thought I'd ask for help.

Current specs:
============
89 FC turbo with stock turbo rims (16x7 +40mm) running Goodyear GT II 225/50/16
Racing beat springs
KYB AGX shocks
~300RWHP

Car is a daily driven street car, so I don't want problems with fender contact. It does not go to the track or local auto-x so I'm not rolling the car over as hard as many of you are.

The fenders are unrolled and I'm afraid to perform this as the custom paint on the car is very thick & old, making it especially prone to shedding it's self in large chips when stressed.

The front springs have rub wear on the coil closest to the maximum tire width

The new rims are 17x7 +22 front and 17x8 +22 rear.

This will push the front rims 18mm toward the fender and the rear rims 31mm toward the fender. The good news is that I get 18mm more of spring clearance on the fronts, but the diameter of the spring is increasing in the direction of the top of the strut. The additional 1" diameter on the rim may reduce this new found clearance.

So I'm fairly certain I'll need to pick a stiff walled 215/45/17 for the fronts or seek something even skinnier like a 205 of some sort. I want to ensure I don't hit the (unrolled) front fenders on large suspension excursions. I worry because when I purchased the car it had 16x7 +20 wheels with the same 225/50/16 tires. At that time the inside fender lip was carving off the outside shoulder of the tire on loaded corners. However it had stock springs & shocks at that time so perhaps there was suspension overtravel contributing to the problem.

The rears ought to work fairly well, but at +31mm to the outside I worry again about inner (also unrolled) fender lip contact. The rim is only 8" wide so I think that a 245/40/17 is probably a safer choice over the 255/40/17 to prevent sidewall bulge. Besides, the side wall height will be a little more symetric front to rear (215/45/17 ~ 3.81" vs 245/40/17 ~ 3.86") which I think produces a cleaner visual.

Would you guys care to think this over and give me any recomendations you might have? I'm really hunting for solid tire recomendations here along with any general experience that might point to this being a failed project before it's begun.

Thanks for your help!

 

This paragraph confuses me some. So your going to run +22mm 16 x 7 & 8's? That will rub my friend. Did they stick out before you lowered the car? I don't want you to have issues either, so respond and simplify this for me...

 

If I were you, I'd get rid of those things.
The offsets are too low to try and get them to fit in the stock fenders.

I find that a 7.0" wide, +35 offset is just about perfect up front.
I run that combo - 16" x 7", +35 with 225 / 50 / 16 S-03 Pole Positions with no rub even at full lock.
Tires do not hit the fender lip either.
You're a full 13mm or about 1/2" pushed out, which I would put money it'll hit the fender lip - and you have confirmed that.

With the 8.0" wide in back, you could've gone up to a +35 to +40 offset, and it'll tuck in the fender even with a 245 wide tire.
The 8" +22 is almost a full inch pushed outwards, and that will get very close to the fender lip back there.
Even with the low offset, I think it should still clear everything?
With FD3S wheels - 16" x 8", +50 - I estimated easily 2" more of clearance under the fenders.
So even with your +22 offset on an 8" wide rim, it should still fit - you still have like about an inch more of clearance?

BTW, what kinda rims are they?


-Ted

 

Yep, the RA's have adjustable bottom perchs, so you can spin them upwards and get at least 1/2" more clearance from them!


-Ted

 

I apologize for the confusion, it's a bit of a ramble isn't it? Thank you for taking the time to reply!

The wheels that I have purchased are:
17x7 +22 for front
17x8 +22 for rear

pics of wheels here on the forum:
https://www.rx7club.com/showthread.php?t=480728

They are a bit of a mystery as to what they actually are, but they look nice (to me). They are made by Work and date back to 1997. They are very similar to the VS-MX wheel or perhaps the Equip M1. I purchaed them from Tony (Z-roc) here on the forum when he made me a deal I felt was too good to let slip by. He was patient with me and sent the additional photos I requested. He also assured me they would fit as long as I went with a skinny tire up front and suggested that they actually came off an FC in Japan. There was a typo in the post though, he spec'd the rear offset at 27mm, but they've turned out to be 22mm instead. It wasn't until I was reviewing a fuzzy photo of the ID tag on the inside of the rim that I realized the rears were 22mm. I had hoped that maybe the mistake would go in my favor and deliver a 27mm for up front but Tony confirmed that the wheels are all 22mm.

 

Ah, no wonder those numbers sounded familiar...

Ok, yeah, drop the tire width and it might just make it.
That down side is that it's not an "ideal" circumference anymore.

Too bad you can't run those 8" ones up front.


-Ted

 

Thanks Ted. Your advice is much appreciated. Sounds like you're recomending a 205 front tire then?

 

Hey I was wondering if anyone has had any experiance with the Tri-Point kit? I have been looking into getting it for track use but I have not talked to anyone with the kit. I am planning on getting 16" wheels but I do not have any idea on how wide are what offset to look for.
Thanks,
-Philip