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16x8 +15 on my FC...what tires do I need?

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Old 01-28-07, 11:32 PM
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16x8 +15 on my FC...what tires do I need?

I have spent days searching for a picture of a FC with a 16x8 +15 rims but I guess they dont exist.

I can pull/flare my fenders if need be but what tire should I run to make these wheels work??

I dont think I would wanna go less than a 45 series sidewall on a 16"

I have a Odula front lip and and R-magic sides so I dont really wanna be on the ground!
Old 01-29-07, 12:07 AM
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Well unless you can add something like 25mm to the fender, then you need to keep the width narrower, which means you'll need higher profile tires to get the diameter correct. A 225/50/16 is a good size, but you'll need to pull the fenders by about 15mm to compensate for the low offset of those wheels.
Old 01-29-07, 12:53 AM
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IMHO, I would run 205/50 front, 225/50 rear. yes, the front will be smaller diameter than the rear....

or if you want to pull the front fenders a little, 225's all around. I would rather have the stagger though...
Old 01-29-07, 11:50 AM
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anyone has pics of this kind of offset??
Old 01-29-07, 12:40 PM
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hmm... I have a pair of 16x8 +14's laying around... if I'm not feeling too lazy later I'll throw them on and take some pics.
Old 01-29-07, 01:07 PM
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Originally Posted by unicorn_squad
IMHO, I would run 205/50 front, 225/50 rear. yes, the front will be smaller diameter than the rear....
Why wouldn't you run 205/55 then?
Old 01-29-07, 03:02 PM
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I would rather have the smaller diameter... for less sidewall flex... and it looks better IMHO. also you can go lower without the tire hitting the top of the wheel well (although that probably doesn't matter in this situation).

205/55 would work too though... just a wierd personal preference...I'm sure it really doesn't make much of a difference
Old 01-29-07, 03:21 PM
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I think that would be a bit much of a sidewall and look more balloon like.

Pics would be sick.
Old 01-29-07, 06:10 PM
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Um 205/55 is the same sidewall height as 225/50.....and if you think running a tire 1" smaller in diameter looks better, well I suggest you buy a 1st gen.
Old 01-29-07, 09:40 PM
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Looking at FC3spro.....it seems the 8" +15 will work in the rear just fine.


The front looks like I will exceed by 10mm, so maybe a rolled fender and a stretched tire. Or....

should I go pulled fenders in the rear with 20mm fenders in the front and add 10mm spacers on ARP extended lug bolts?
Old 01-30-07, 02:10 AM
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****... I tried to put those wheels on but they hit the brake caliper.... so sorry.....

but here they are on my friend's car with 14mm spacers... so 16x8 +2 with a 205/50 and some - camber.

so I guarantee you they will fit nicely with just a roll of the fender.





Old 01-30-07, 07:27 AM
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wow.. thanks for even going out to your garage and trying to do that unicorn squad. much appreciated.

so that gray FC up there is running a 205/50 on a 8" wheel?? looks good.

there has to be no way those tires in that picture^^^^ are +2 offset on stock fenders, are you sure?????
Old 01-30-07, 01:20 PM
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16x8 +15 on my FC...what tires do I need?

16x8 +15 on my FC...what tires do I need?

You need tires that are mounted on rims with the correct offset for your car. :P

~Mike..........
Old 01-30-07, 01:28 PM
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Originally Posted by yusoslo
wow.. thanks for even going out to your garage and trying to do that unicorn squad. much appreciated.

so that gray FC up there is running a 205/50 on a 8" wheel?? looks good.

there has to be no way those tires in that picture^^^^ are +2 offset on stock fenders, are you sure?????

NP. yeah, 205/50 on a 16x8. and yes, +2 offset. keep in mind it has probably like 4 degrees of - camber, and the fenders are pulled a little.
Old 01-30-07, 01:29 PM
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Originally Posted by RacerXtreme7
16x8 +15 on my FC...what tires do I need?

You need tires that are mounted on rims with the correct offset for your car. :P

~Mike..........

hahahaha.
Old 01-30-07, 01:32 PM
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awesome. Well I will definetly get these wheels then. I can always massage the fenders a bit to make this work.

In the rear I am thinking a 225/45??
Old 01-30-07, 02:19 PM
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yeah, that would work fine.
Old 01-30-07, 03:39 PM
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using the tire calculator

Front 205/50/16 Diameter 24.07in Sidewall 4.03
Rear 225/45/16 Diameter 23.98in Sidewall 3.98

I think since the fronts will be more stretched you wont be able to tell that the rear tire has a slightly smaller sidewall.

Anyways unless anyone else contests This seems to be the setup I am going for!!!

on these rims! With a top secret gold powdercoated center against my white FC!!

Old 01-30-07, 05:18 PM
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Originally Posted by yusoslo
using the tire calculator

Front 205/50/16 Diameter 24.07in Sidewall 4.03
Rear 225/45/16 Diameter 23.98in Sidewall 3.98

I think since the fronts will be more stretched you wont be able to tell that the rear tire has a slightly smaller sidewall.

There will only be a .045" differance in side wall height. Not many people can see that, let alone with different side wall angles.

Originally Posted by yusoslo
Anyways unless anyone else contests This seems to be the setup I am going for!!!
I contest , it just bugs the **** out of me that someone will waste money on rims that don't fit and run STOCK tire widths. 0 performance gains. "well, it makes the track wider"...... so, bullshit, it wont improve handling. Your not gaining any traction, the tire still is narrow as the stock, there just pushed out farther, which by the way changes your scrub axis point of your contact patch making for a car that likes to follow imperfections in the road and dart around like a crack head looking for a fix. This also puts more load on your wheel bearings. If your going through all the trouble of rolling your fenders and such, why not get some tires that are wider then stock? And staggering tires on same size wheels bugs me too (looks dumb) and now you can't take the advantage of having same size wheels and rotate your tires.

Lastly, you have a SE 2nd gen correct? If its a Sport, GXL, Turbo, or vert, those 4 lug wheels WONT WORK!! Also, you realise that if you buy these wheels, you wont beable to use them if you decide to upgrade to better brakes of the aformentioned other Rx-7 models right?

Well, its all personal prefferance, I'm just given you some food for thought incase you havent thought about the things I've just said.

GOOD LUCK!

~Mike............
Old 01-30-07, 05:34 PM
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Originally Posted by RacerXtreme7
There will only be a .045" differance in side wall height. Not many people can see that, let alone with different side wall angles.



I contest , it just bugs the **** out of me that someone will waste money on rims that don't fit and run STOCK tire widths. 0 performance gains. "well, it makes the track wider"...... so, bullshit, it wont improve handling. Your not gaining any traction, the tire still is narrow as the stock, there just pushed out farther, which by the way changes your scrub axis point of your contact patch making for a car that likes to follow imperfections in the road and dart around like a crack head looking for a fix. This also puts more load on your wheel bearings. If your going through all the trouble of rolling your fenders and such, why not get some tires that are wider then stock? And staggering tires on same size wheels bugs me too (looks dumb) and now you can't take the advantage of having same size wheels and rotate your tires.

Lastly, you have a SE 2nd gen correct? If its a Sport, GXL, Turbo, or vert, those 4 lug wheels WONT WORK!! Also, you realise that if you buy these wheels, you wont beable to use them if you decide to upgrade to better brakes of the aformentioned other Rx-7 models right?

Well, its all personal prefferance, I'm just given you some food for thought incase you havent thought about the things I've just said.

GOOD LUCK!

~Mike............

take this guys advice.

keep your stock wheels and run 225 width R-compounds all day. then you will have crazy grip around corners so you can street race all night and win every battle you get in. and who cares how it looks, the only reason people buy aftermarket wheels is for performance.

and then you won't have to worry about destroying your wheel bearings, and your car won't track the road like a crack-head.
Old 01-30-07, 05:52 PM
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Ok guys..I already am running Falken azenis on my car right now 225/45/16. The car grips just fine. These are my auto-x tires and rims.

These are just my..."make the car look nice" rims.

I am running 4 lug setup with the 2 piston caliper upgrade and custom pads. I can lock up my tires on the highway at 100 if I really wanna.

I also am getting Hoosier R compounds on diamond wheels for circuit racing. So really I dont care about the minimal performance. I dont push my car 110% on the street. I have fun with it and floor it and take onramps double to posted speed.

I really push my car at the track where its safe.


So I hope that clear up my choice for everyone. Plus I dont daily drive the rx-7 I have an Audi for that.
Old 01-30-07, 06:05 PM
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Well I suggest that if you're autocrossing with them that you'll need to get quite aggressive with fender rolling. Just because they "fit" in the picture doesn't mean they'll not rub. When turning hard at the autocross the suspension will be compressed and the wheel turned, which will most likely put the tire and fender in the same place at the same time for big time rubbage.
Old 01-30-07, 06:48 PM
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You missunderstood. I have different rims for auto-xing. thats what my azenis are on. They dont rub.


These wheels will be for cruising and looking nice, photshoots, drifting...etc. I shall call them my play wheels.

Then I will have my auto-x wheels
and my circuit wheels
Old 01-30-07, 07:19 PM
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Old 01-30-07, 08:19 PM
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Ok so maybe I didn't read the whole thing, but the point remains, when you take a corner hard there's still likely to be fender contact. Even just going over speedbumps or exiting parking lots or any number of other things that happen all the time could cause rubbing.


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