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Maximum Wheel and Tire Width Fitment Guide for the FD

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Maximum Wheel and Tire Width Fitment Guide for the FD

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Old 01-02-18, 03:47 PM
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I don't want to do any fender modification except maybe tucking the inner lip.
And though like 1-1.5 degree negative camber is fine up front, I think I like to keep the rear neutral.

Originally Posted by GoodfellaFD3S View Post
Anything I can do to talk you out of mounting Rotas on an FD ?
I don't really get the hate toward them. They're lighter than all the other wheels in the price range and come in many mounting options.
The only other alternative I could find are RPF1s which I think look hideous on an FD.

Volks cost as much for 1 wheel as Rotas cost for 4... From what I can see, Rotas are pretty similar spec to the Spirit-R wheels but cheap. And I think the look nice on an FD.
I'd love a set of Volks, but they simply cost too much.
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Old 02-13-18, 01:58 PM
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Hey Folks,

I've been trolling the used market for a square set of 18x9.5 +45 for some time. I've come across a good buy on a set of 18x9.5 +40.

Can I get some feedback on fitment with that slight variance beyond what has been discussed as the far limit of front fitment?

I noticed "jonahau" above is running 18x9.5 +38 but with 255s. I was hoping to run Advan Neova AD08R in either 265/35/18 or possibly 285/30/18 as an alternative.

Thank you.

L T
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Old 02-13-18, 03:18 PM
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Most 265/35-18 are too tall and will rub the inner fender near where you can see the fender liner under the hood.

Up front +40 offset will fit 265/35-18 with max front camber (~-2.4 depending on ride height) and a fender lip roll. +40 will fit 285/30-18 up front with max front camber and a fender lip roll with mild to moderate pull.
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Old 02-13-18, 04:31 PM
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Originally Posted by BLUE TII View Post
Most 265/35-18 are too tall and will rub the inner fender near where you can see the fender liner under the hood.

Up front +40 offset will fit 265/35-18 with max front camber (~-2.4 depending on ride height) and a fender lip roll. +40 will fit 285/30-18 up front with max front camber and a fender lip roll with mild to moderate pull.
This rubbing would occur only on slammed cars or in a bottoming out scenario? I'm only on RB Sport springs and don't plan on ever going lower than my driveway will allow, which is about right where it is today.

Thank you. Any other tire sizes I should be considering that are friendlier? I guess 255/35/18. Would that help? Would that be too "stretchy"?

Last edited by LT 562; 02-13-18 at 04:35 PM.
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Old 02-13-18, 08:39 PM
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This rubbing would occur only on slammed cars or in a bottoming out scenario? I'm only on RB Sport springs and don't plan on ever going lower than my driveway will allow, which is about right where it is today.
The rubbing from too tall a front tire happens anytime you turn the front wheels and yes, can also rub other places when you hit a bump and the tire bottoms before the suspension.

My experience was with 265/35-18 Federal 595 RS-R which are pretty short for 265/35-18 at 25.3" tall. These tires rubbed slightly where I mentioned on the plastic fender liner in the area you can see it in the engine bay when the wheels were turned and in addition my car has the factory mud flaps and the tire also rubbed these when turning. The problem subsided as the tires wore.

265/35-18 range in diameter from 25.2" tall (like Yokohama A048) to 25.5" tall (like Pirelli P-Zero Corsa).

My 295/30-18 are 25" tall and do not rub (in case you are not convinced it is a tire height issue not a tire width issue).
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Old 02-14-18, 12:08 PM
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Originally Posted by BLUE TII View Post
The rubbing from too tall a front tire happens anytime you turn the front wheels and yes, can also rub other places when you hit a bump and the tire bottoms before the suspension.

My experience was with 265/35-18 Federal 595 RS-R which are pretty short for 265/35-18 at 25.3" tall. These tires rubbed slightly where I mentioned on the plastic fender liner in the area you can see it in the engine bay when the wheels were turned and in addition my car has the factory mud flaps and the tire also rubbed these when turning. The problem subsided as the tires wore.

265/35-18 range in diameter from 25.2" tall (like Yokohama A048) to 25.5" tall (like Pirelli P-Zero Corsa).

My 295/30-18 are 25" tall and do not rub (in case you are not convinced it is a tire height issue not a tire width issue).
Thank you. But with the 295 (or 285), I would still need to work the front fenders, correct? I'd like to avoid anything drastic.

Any thoughts on 255/35/18? Seems like it checks most boxes, just not sure how the +40 still plays in.
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Old 02-14-18, 12:19 PM
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Thank you. But with the 295 (or 285), I would still need to work the front fenders, correct? I'd like to avoid anything drastic.
Yes, but you will have to roll the front fender lip under for 265/35-18 on +40 offset as well.

Any thoughts on 255/35/18? Seems like it checks most boxes, just not sure how the +40 still plays in.
Easier fit with +40 offset.
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Old 03-12-18, 08:29 PM
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Originally Posted by BLUE TII View Post
Yes, but you will have to roll the front fender lip under for 265/35-18 on +40 offset as well.



Easier fit with +40 offset.
Ok got the wheels and about to buy tires. You think 245/35/18 would be too small of overall diameter? I'd hate to get 255/35/18 and have front fender rubbing when 245 was an option.

But maybe not an issue running moderate height RB springs?

Thanks for the feedback.
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Old 03-12-18, 11:19 PM
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245/35-18 is pretty low profile/short at 24.5" when stock tire height is 24.8-24.9" tall.

I would risk the 255/35-18 up front and put at least 2 degrees negative camber on the front so the +40 wheels don't cause tire to catch your fender lip turning up slopes.
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Old 03-16-18, 02:37 PM
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Originally Posted by LT 562 View Post
Ok got the wheels and about to buy tires. You think 245/35/18 would be too small of overall diameter? I'd hate to get 255/35/18 and have front fender rubbing when 245 was an option.
Originally Posted by BLUE TII View Post
245/35-18 is pretty low profile/short at 24.5" when stock tire height is 24.8-24.9" tall.
I would risk the 255/35-18 up front and put at least 2 degrees negative camber on the front so the +40 wheels don't cause tire to catch your fender lip turning up slopes.
245/35-18 isn't too small, pretty much stock diameter at 24.8". I'd rather go slightly narrower and shorter and not have to worry as much about rubbing while also being able to run a lower front ride height if desired...
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Old 03-17-18, 10:08 AM
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Originally Posted by ZDan View Post
245/35-18 isn't too small, pretty much stock diameter at 24.8". I'd rather go slightly narrower and shorter and not have to worry as much about rubbing while also being able to run a lower front ride height if desired...
Ha! Already ordered some PSS on close out in 255 and should be here today. I know the diameters basically straddle stock so maybe the 5mm on each side will be negligible. Keeps the stretch a bit more moderate too. Hopefully I'll be ok considering my driveway keeps my ride height conservative. I'll let my alignment guy work his magic. We shall see.

Thanks for all the great input.




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Old 04-03-18, 04:46 PM
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Can anyone provide input - browsing around wheel setups, and looking at the Enkei Lusso:

LUSSO Enkei Wheels

How would a 18x8 +40 on the front and 18x9 +40 fit on a FD? I've seen a few with 18x8 all around, but would prefer a staggered setup:




Thanks in advance

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Old 04-04-18, 11:46 AM
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Yes, that setup will work.....you may want to think about an 8.5 up front an 9.5 rear they will fit nice with a +40 offset, and let you put on a bigger tire. I recommend having the front fender lips rolled, it just takes the stress off catching a fender, one rub an the fender is a mess! The rears should be fine, I have 18 x 9.5 +40's on my rear with the stock camber settings, the 275 x35 tire has never touched the fender. Nice looking wheel!
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Old 04-05-18, 11:28 AM
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Originally Posted by Greg Sabol View Post
Yes, that setup will work.....you may want to think about an 8.5 up front an 9.5 rear they will fit nice with a +40 offset, and let you put on a bigger tire. I recommend having the front fender lips rolled, it just takes the stress off catching a fender, one rub an the fender is a mess! The rears should be fine, I have 18 x 9.5 +40's on my rear with the stock camber settings, the 275 x35 tire has never touched the fender. Nice looking wheel!
Thanks Greg for this answer - to follow this up, I should state that is is really the first time I'm actively thinking of offsets, instead of just buying whatever is off the shelf for the car, Tire Rack recommended, etc. The above pic is of a square 18x8" setup that I found, & one of the only FD's I've ever seen running these Enkeis. I haven't yet found anyone trying the 18x9's on the rear. Here's a pic of the 9's, with the associated lip that they have over the 8" version:


I plugged the specs of the 18x9 +40 into an offset calculator, in comparison to the stock 16x8 +50 FD wheels, and came up with:



So, that looks pretty good fitment wise as Greg described - given how sunken in the stock FD rears are, this sounds like this would be pretty close to flush, or maybe a little sunken in which is OK - what I absolutely want to avoid is any kind of "poke" past the fender as I'm not a fan of that look.

Then I came across this Reddit thread, where someone has other Enkei wheels mounted, including a 18x9 +40:

https://www.reddit.com/r/RX7/comments/4jz042/94_fd/?st=jfmmw3zq&sh=4f830386

Enkei RS05RR, 18x9 +40 in the front with 245/40/18 and 18x9.5 +35 with 265/35/18 Dunlop Star Spec II


Now, just imagining that front 18x9 +40 moved to the rear, it looks like it'd stick out a good bit, and his rears are obviously way out there past the fender. Looking at the specs Enkei provides for the Lusso, they reference "Inset 40", which, if I'm correct, can be translated to "negative offset 40" or -40 (?). That seems pretty extreme - so maybe the internet lied to me and "inset" is the same as "positive offset"...

http://enkei.com/wp-content/uploads/2015/01/LUSSO.pdf

So, I guess my follow-up question is - will these 18x9 +/-/inset/whatever 40 Lusso wheels sit flush, inset (inside the fender) or poke out the fender? Why do the above 18x9 +40's in a different Enkei model stick out so much? Sorry if I'm beating a dead horse, but I want to be 110% sure and the terminology/math is somewhat confusing this first go-round.

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Old 04-05-18, 11:59 AM
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Now, just imagining that front 18x9 +40 moved to the rear, it looks like it'd stick out a good bit, and his rears are obviously way out there past the fender.
You have created a false choice between 18x8 +40 and 18x9 +40 in your mind- there will be no difference in tire fitment. There is no reason to buy the 18x8 +40 over the 18x9 +40.

Offset fits the tire. The tire is what interferes with the body. That is all.

Here is the 18x8 +40 and the 18x9 +40 shown with the same 265/35-18. Note your choice of tire is problematic because it is too tall and causes rubbing on the fender liners when turning. 255/35-18 or 285/30-18 are the correct height tires.
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Old 04-05-18, 12:17 PM
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So, I guess my follow-up question is - will these 18x9 +/-/inset/whatever 40 Lusso wheels sit flush, inset (inside the fender) or poke out the fender?
It will fit inset to the fender.

Wheel/tire fitment depends somewhat on alignment as more negative camber will tuck the top of the tire into the fender.
Wheel- with stock alignment (least aggressive) the 18x9 +40 will be well within the fender.
Tire- with stock alignment (least aggressive) the 265/35-18 tire be slightly poked out from the front fender as 265mm tire is ~ 10.5" wide and a 9" wheel is ~10" wide.

If you run max front camber up front (~ -2.4deg) the 265/35-18 tire will be flush with the fender and with a fender lip roll will work without rubbing the fender (just rubbing the fender liner when turning because 265/35-18 is too tall a tire). If you run max front camber the 18x9 +40 wheel is now even more inset to the fender by another 10mm or so.

You can see why you will never get a flush wheel fitment when the tire is too wide for the wheel. 245/35-18 or 255/35-18 is the correct width for an 18x9 wheel (and the correct diameter for the FD).

Here is a side shot of my car with 18x10.5 +38 and 265/35-18. Max front camber (-2.4deg) Min rear camber (-1.2deg)- front fender roll required, no roll on rear fender.
The +40 offset will move the tire sidewall in 2mm over what I had.

Comparing 18x9 +40 and 18x10.5 +38 both with 265/35-18.

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Old 04-05-18, 12:19 PM
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EDIT: posted this at the same time as your reply above, BLUE TII

Thanks for the reply BLUE TII, I hadn't even really gotten to tire fitment in my mind yet - I just tossed the 265/35 into the calculator to put something in there that sounded appropriate for a 9" rim. I've so far been 100% focused on the question of fitting a 18x9 "inset 40" Enkei Lusso - whether it will be inset, flush, or poke with that sizing & offset relative to the rear fender lip. It's a given that a 18x8 "inset 40" Enkei Lusso will fit on the front of the FD as there is the aforementioned handful of FD's out there running them on the front, so I'm at this point totally concerned with the 18x9 on the rear and the above question.

That diagram you posted comparing the 8 & 9 does help, though I'm still confused as to why the above Enkei RS05 on the MB car, in a 18x9 "+40", sticks out so much past the front, or as it would, rear fenders. Imagine there would be no tires mounted on that wheel - the bare lip itself would be poking out there pretty healthily. Are not all wheels created equal when you talk offset in relation to overall width? Would you say the 18x9 "inset 40" Lusso would sit flush, inset, or poke out on the rear of a FD?
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Old 04-05-18, 12:34 PM
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That diagram you posted comparing the 8 & 9 does help, though I'm still confused as to why the above Enkei RS05 on the MB car, in a 18x9 "+40", sticks out so much past the front, or as it would, rear fenders. Imagine there would be no tires mounted on that wheel - the bare lip itself would be poking out there pretty healthily. Are not all wheels created equal when you talk offset in relation to overall width? Would you say the 18x9 "inset 40" Lusso would sit flush, inset, or poke out on the rear of a FD?
That is your mind imagining where the wheel is in relation to the fender.
It is impossible to tell by looking at a straight on picture of the side of the car, it would require a profile picture.

18x9 +40 without tire would fit inset on front and rear of an FD.
If you take a ruler and put it on a stock 16x8 +50 top wheel lip the 18x9 +40 would be 22.7mm more outward (0.89"). You can now check that for your self on your own car with its current alignment.
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Old 04-05-18, 12:41 PM
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Originally Posted by BLUE TII View Post
That is your mind imagining where the wheel is in relation to the fender.
It is impossible to tell by looking at a straight on picture of the side of the car, it would require a profile picture.

18x9 +40 without tire would fit inset on front and rear of an FD.
If you take a ruler and put it on a stock 16x8 +50 top wheel lip the 18x9 +40 would be 22.7mm more outward (0.89"). You can now check that for your self on your own car with its current alignment.
Excellent, I thought it might be an issue of optics using that pic, but it was just about the only one I could dig up with a 18x9 +40 on the FD. Thanks a ton for the help & confirmation. Just for the sake of providing information for any future searches, here's another pic I just found of the Lusso in 18x8 +40 on the front, and rear of a FD. Instagram user "hella_fd3s".



Thanks again, Greg & Blue TII
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Old 04-06-18, 01:04 PM
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Before you buy any wheels, have a look at the TSW Valencia, and if you don't want the 3 piece rivet look, the Tremblant wheel (very close to the Enkei Lusso look), both wheels have a choice of a 9.5 wheel the Lusso only goes to 9 inches for the 18" wheel.....I did the Valencia 18x8 +40 front 255 x35 tire....18x9.5 +40 rear 275x35 tire.....rolled the front fenders, did not roll the rear. The car is lowered about an inch.....Tested for 2 years over bumps, rail road tracks etc.....never touched the fenders. I really like the 9.5 lip on the rear, it makes the back-end look more aggressive....and nothing sticks out....I don't like that look either!
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Old 04-08-18, 03:40 PM
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Been searching for fd widebody fitment all I find are stock body FD fitment. I can get my hands on a set of work bersaglio 5
18x10 +7
18x12 +7

can anyone tell me how much these will stick out from stock body fd? I will post a picture i found online of what I'm planning on for my personal fd widebody.
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Old 04-15-18, 10:03 PM
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Quick question. I have a pair of wheels that 17x8 +35 off set and im trying to buy tires for them on my stock body FD
Any recommendation of sizing so it dosent get too tall or potentially easy to rub on my fender lip ? 235 40 17 ? Or 225 45 17
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Old 04-16-18, 10:00 AM
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Been searching for fd widebody fitment all I find are stock body FD fitment. I can get my hands on a set of work bersaglio 5
18x10 +7
18x12 +7

can anyone tell me how much these will stick out from stock body fd? I will post a picture i found online of what I'm planning on for my personal fd widebody.


"Flush" and "stick-out" can be relative terms.

If I put a yard stick on my 295/30-18 on 18x11 +45 with -2.4 front camber and -1.2 rear camber the yard stick touches the bottom of the wheel rim, the top of the wheel rim and the top outside of the stock fenders (rear lip rolled under, front lip rolled under with some pull).

I would call that flush.
The 18x10 +7 will stick out 25.3mm (1") from that the 18x12 +7 will stick out 50.7mm (2") from that.

Every 1 degree camber less on the alignment would make the top of the wheel stick out another ~6mm or vice versa.

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Old 04-16-18, 10:49 AM
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Hey guys I recently picked up some SSR Long Champ Vip Wheels from my buddy Circuit Theory. I need some help with tire sizing for a stockish 3rd gen. The wheel specs are 18x8 fronts 18x9 rears all with a +35 offset. And suggestions on tire sizing and Fitment would be greatly appreciated.
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Old 04-16-18, 11:01 AM
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Originally Posted by kensin View Post
Quick question. I have a pair of wheels that 17x8 +35 off set and im trying to buy tires for them on my stock body FD
Any recommendation of sizing so it dosent get too tall or potentially easy to rub on my fender lip ? 235 40 17 ? Or 225 45 17
225/40-18 is the right diameter and should fit, especially if you run some negative camber (which imo you should anyway...). You might consider 235/40-18 in back which would be slightly taller and wider. Up front 235/40-18 would likely tweak the fender lip if it isn't rolled...
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