Hello Martin. First of all great choice going with CCW. Having a set of custom offset wheels made definitely expands your fitment choices for our high offset happy FD3S.

Is there any reason why you wouldn't want to run a 285/30 up front? I would run a 285/30 on a 18x10 +52. This fitment has been done many times and fits well on RX-7s. This wheel would retract 1 mm in towards the body compared to the RPF1 18x9.5 +45... negligible...

For the rear you could run a 18x10 +52 rear with a 14mm spacer. This would allow you to rotate tires and have the same fitment as the 18x10 +38 Enkei.

You could also run a 295/30 18 on a 18x10.5 +44 which would fit the same as your Enkei. If I remember correctly only the CCW classic comes in a 10.5 width...

If I were you I would run a 18x10 +52 front with a 285/30 and a 18x10.5 +44 with a 295/30. You will need to roll your fenders slightly to run these sizes.

Good luck with the wheels and post your results.


-Andrew

the reason i don't run 285 30 18 up frount is i have a set of 245 40 18 r888 and a set of 255 35 18 toyo r1r so i got to use them before i buy any new tires, i think ill get the 52 offset and see if i can run a 5m spacer then i can run 285 when i buy tires again. as for the back i really don't care for rotateing tires i'll just burn up the rear and buy new ones haha. so ill go 18x10.5 with a 44 offset that way i can go 295 or 285 depending on witch rcomp's are cheaper. i plan having this all done newyear's time will post pics.

Hmm...I would not run the 240/40 18... the .25.7 inch overall diameter is too tall for the front of an FD.

I personally would sell the tires that you have and pick up a different set. If money is an issue I would look at the NASA/SCCA/Evo/Subi forums for used tires. A little searching can go a long way here.

Also, both a 255/35 and a 245/40 are very small and will be very stretched on a 10.5 inch wheel.

Good luck,

Andrew

How much will a 315x30x18 on 18x11 (rear) affect my gearing?

Also, this produces aprox 3/4 of an inch taller tire overall when compared to the front using 285x30x18 on 18x10.

Would going to a slightly wider rear wheel (1/2") produce enough stretch to reduce this sidewall height?

Thanks!!!

This would affect your gearing by 2.8% which is significant but should not stray you away from running a 315/30. The 315/30 is 25.44 inches which large but not too large...many people run 275/40 17s which run 25.66 inches which does fit in the rear. What wheel do you plan on running to accommodate the 315?

A .5 inch wider rear wheel will help but not too much, but then again you need as much help as you can fit a 315 on an RX-7.

Good luck and post your results.

-Andrew

lol this thread is a copy of my zilvia thread maximum rubber and wheel fitment thread hahaha I love it though, I am glad :) Fat rubber = win :) But uhm needs more pictures :)

Interesting...Heres my setup (fairly plain I'm sure).
 

I am running a set of Volk GTC's which I had made special.

18" all the way around. 9" front & 10" rear.

Tires are 235/40 front & 265/35 rear. I have thought about going wider in the rear, a little wider. Although stickier tires the same size would probably due.

However, my last set of tires were 225/40 for the front and they never rubbed my upper/outer fender lip. The 235/40's are a little wider and therefore a little taller too. As a result, when I drive across bridges on the highway for example, the front tires rub the fenders. I'm used to it now and I couldnt change till they were bald anyway.

http://i1039.photobucket.com/albums/...R1PB/004-1.jpg

I have 18x9+44 255/35
and 18x10+44 275/35

on a good drop and they fit perfect. I dont have the rears rolled at all. full stock. only additional piece I have are coilovers. so they might make more room on the inside. but no toe/trails.

plus they are for sale in the wheel section :blush:

What do you mean that you had the wheels "made special?" What offsets are you running?

I would run a 255/35 18 up front instead of the 235/40 18. The 255 is a 25 in overall diameter tire as opposed to the 235 which is 25.4 inches. This will help your rubbing issue.

As for the rear...I would run the relatively rare 295/30 18. More tire manufactures are producing this tire now and it is an excellent fit for your 10 inch wheel. A 10.5 would be ideal but many people have successfully run the 295/30 on a 10 inch wheel and it is within the tire manufactures wheel width specs. A 285/30 would actually be shorter than the 255/35 up front and would look somewhat strange as the front of your car would be higher than the rear...

Post your results when you decide to purchase new tires.

-Andrew

This thread really does answer a lot of questions very well. I've been trying to figure out some sizing for a while now and I think I'm pretty close.

My goal the following combo with FEED fenders front and rear:

front: 285/30 on 18x10.5 +42
rear: 315/30 on 18x11.5 +38

I realize this isn't going to be an off the self wheel and I promise, I'll get the fenders mocked up and measured before actually ordering wheels/tires.

Hopefully before the spring!

I do not have any experience with FEED fenders. I would ask Rishie (username: ARD T2) about your project. I would also be somewhat skeptical about FEEDs claims. It seems that the FC guys are buying up fenders that claim to be larger than they actually are...

That said your fender clearance on the front is about 16mm beyond what the stock fenders can do.

Your rear fender clearance is about 15 mm beyond what the stock fenders can do.

You have more than enough inner clearance on the front and rear.

Good luck with the project and post your results!

-Andrew

I already ordered these so I can run a 295/35 tire but out of curiosity would the Stoptechs clear the RPF1 17x10 +38 rim? I was previously running 17x9 +45 (275/40 tire) and had to run a 5mm spacer to make them fit. So I'm assuming it would fit without the spacer now.

thewird

You'll have 6mm less inner clearance, so probably not. Depends of the concave of the spoke I guess, but since RPF1's pretty much never have concave....

This'll tell you.

http://www.1010tires.com/WheelOffsetCalculator.asp

That inner clearance is inner edge of the rim to the car, not the position of the spokes. It's a wider rim so its natural the outside edges would extent out lol. I figured with an extra 7mm of offset (the rim itself is sticking 7mm out) that would allow me room to get rid of my 5mm spacers but hard to say since the rim is now wider too so I'm not sure how that affects the spokes.

thewird

Quoting myself. Infinite loop.

So again would anyone know if it fits without the spacers?

thewird

So you are worried about the spokes clearing the stoptechs? Or are you worried about the rim sitting flush with the fender? It's not quite clear from your post. Your new wheels will sit about 27 mm or about an inch further out then your current set up.

I'm wondering if it will clear the stoptechs without spacers. I'm not worried about the fenders as I'm finally putting on my 20mm wider fenders.

thewird

While I do not know for sure I would assume that the 17x10 +38 will fit Stoptechs. The 18x9.5 +45 does fit Stoptechs and is concave like the 17x10+38. It is good to hear you are running a widebody to fit these as you will definitely need it. Are you going to to running the Kumho XS or the Hoosier 295/35 17 (Damn that is a great size for an FD!)? The reason why I ask is because the XS runs VERY wide. Something to consider when trying to fit that beast in the front.

Here is Stoptechs fitment guide. I don't know if you have the wheel sitting in front of you...
http://www.stoptech.com/tech_info/wheel_fitment.shtml#m

Here is a pdf that you can cut out to check your wheel clearance:
http://www.stoptech.com/tech_info/ch...46-2450-00.pdf

My Blitz Type 01 Fitment
 

Well I guess it is time to post my wheel fitment...

I have a set of discontinued Blitz Type 01 in 17x9 +45 and 17x10 +45 sizes that I had refinished and the lips mirror polished. When Blitz produced these wheels this was the fitment that they recommended for Supras. Time to scour the Supra forums gentlemen! They are one of the few wheels that have an excellent lip that also fit Stoptechs too...not that I have Stoptechs yet...

I decided to go with Kumho XS 255/40 17 and 295/35 17. Let me tell you that the 295/35 17 is HUGE. Even with my relatively conservative 17x10 +45 I still need to roll the rear fenders. The tire actually sits perfectly inline with the outer lip of the fender. I may need to have the fender pulled a touch even which I am not happy about. We will see. Right now I am at 25 in ride hight in the front and 26 in ride hight in the rear. Once the rear is rolled I hope to drop the rear to around 25.5 in or so. The 295/35 17 also seems to be a bit taller that the 25.1 in advertised diameter. This is exacerbated now that it is on a relatively skinny 10 inch wheel.

The rear tire does rub on bumps and medium cornering. The front does not rub at all. I am running Tein Flexes with RB rear sway bar and the Tripoint front bar. I have not had the car aligned yet as I am waiting to get the rear fenders rolled, my Superpro bushings and Rotary Extreme toelinks and trailing arms installed. Hopefully these in combination will help my rear rubbing issues.

Overall, I am very happy with the fitment. I like period correct wheels on cars. Blitz Type 01 are that. I like wide tires. The 255 and 295s are that. I don't like rubbing...trying to fix that.

Pics:

https://lh3.googleusercontent.com/_V...121_140150.jpg

https://lh5.googleusercontent.com/_V...114_155140.jpg


https://lh6.googleusercontent.com/_V...114_155128.jpg

https://lh3.googleusercontent.com/_V...114_155106.jpg

HellaMEAT fitment!

Can you take the time to measure the 295/35/17 Kumho XS? Im curious to how it measures out on a 10" wheel.

Tonight I will post fitiment and measurements of a 275/40/17 V710 and a 295/35/17 A6. Gist of it is the 710 fits easy, is a hair shorter, and only about .25" narrower tread than the A6 that is tight fitting everywhere, but does fit.

I run the Hoosier r6. I also run very stiff suspension, 16k front 18k rear. I had no problem running 275/40/17 on a 17x9 +45 with 5mm spacers on stock rolled front fenders only. So I don't expect to have any issues with the 295's with the wider front fenders and rolled rears but if I have to run spacers to clear the stoptechs its going to be iffy. I haven't received the rims yet, should be here end of this month.

thewird

the 295 fit my stock rear fenders with about 2mm clearance on a 17x10 +52 rim -2 degrees camber at 25.25" ride height. I think it's going to be really tight with a +38 wheel, what camber do you run?

Stock +1 degree all around, whatever that is. I was going to give it a little more camber since my tires seem to have a tendency to wear a touch more on the outside but my mechanic who is an old racer himself said to leave it for now since the lower profile tires will have a stiffer sidewall and roll less and might make the difference. I'm gonna buy a tire pyrometer this year anyway since I wan't to setup my car as close to perfect as I can.

thewird

For reference, both mounted on a 10" rim

295/35/17 Hoosier A6 corded
overall height 25.25"
overall width 11.625"
tread width 11.25"
"useable tread" 10.75"

275/40/17 Kumho V710 Full tread
overall height 25.25"
overall width 11.125"
tread width 10.75"
"useable tread" 10.5"

I call the useable tread the flat face of the tire.
In the pics the fenders are stock and i pulled the shock to give free motion of the suspension, pics are at what would be close to full compression.

usable tread on a v710 is all the way to the corner. they're designed to roll over the rounded part

What is the offset on your rims?

thewird

offset is +52


This is true, and true of the Hoosiers as well, My experiance on the road course is that the shoulders dont see the same use in an FD the way they do in a mac strut car. This has lots to do with car setup, wheel and tire width, even driving style, probably should have left "useable tread" out because its pretty subjective.


And a few more pics to show the fit, hoosier is out back and kumho is on the front. For the first set of tires this season I will be running the kumho, MIGHT run a set of R6's for the last half of the season.

Great Thread,

I'm looking to change my wheels to 17x9 enkei rpf1
I was wondering if +35 offset front and +22 offset rear would work?

Its an FD race car all fenders are rolled.

In the class I run we use 225-45-17.

Do you think I'll have clearance problems?

thanks
Jose P.

I currently have enkei 17x 8 rpf1 with +35 offset allaround
but I'm using 3/4'' spacers in the front and 1'' in the rear.

so if my math is correct I shouldn't have a prob, but I want to confirm

Kind of late to the party here, not sure how I missed this thread earlier.

Someone asked if 285/30/18 on a 18x9.5 +38 wheel will fit the front of an FD.

The short answer is 'Yes'. That's what I was running until very recently.

Kumho 285/30/18 V710's on Enkei RPF1 18x9.5 +38

The only mods required are coilovers and rolling the fender lip.

My new setup is Forgestar 18x10 +50 with Hoosier A6 285/30/18

Front's fit without issue. I might add that the Hoosiers are about .75 inch wider than the Kumho's.

Rears required aftermarket trailing arms, and 5 lb sledge hammer applied to the inside of the fender well about 6 inches up from the bottom, just above the trailing arm. The exact area where the .5" hole in the fender well is.

This really helped, thanks for the great post I will be getting the 17x8.5/17x9.5 setup in the spring

awesome thread!! thanks

This has helped a ton. Thanks!

This thread should be stickied

18x9.5 +45 with 285/30/18 (yoko A048)
Ride height is ~25.5" with coilovers


Rear clears no problem.

Fronts rub the upper bolts holding the fender liner in place only on the street hitting large dips/bumps. On the track they do not rub at all.

whats the lowest offset i could run on the front with an 8.5" wheel up front?

I'm running 19X9.5 and 19X10.5's, both 38-offset.

255/35/19 and 295/30/19 tires.

Attachment 711551

Installed pictures coming soon.

Plans are to roll the fenders until I can afford to do my full widebody conversion.

what about 17x8 ET44 all around?

This thread is for wide wheels. 8 inch wide is stock. Why would you want to run at 17x8? That is the same as stock...that said, yes a 17x8 +44 would fit...won't look good or function better than stock though!

17x9 +25 f / 17x10 +20 R
 

Ok well the wheels I'm thinking of getting are

17x9 +25 f / 17x10 +20 R


in the front I will run 245/40/17's

in the rear 255/40/17

with this offset the wheel calculator says it wil poke .52 in the fornt , and .72 in the rear

fender will be rolled .

will this fit? without tomuch trouble?

I love this thread! Im curious what you guys think about this setup..

18x9.5+30
255/35 18
(both front and rear)

Will this fit with the feed front fenders?
Also.. how low can i go with this setup? Can i tuck tire with this?

Great thread!
I am currently running on TE37s, 17x8.5 +40 front, 17x9.5 +40 rear, with 255/40 front 265/40 rear StarSpecs.

StopTech front brakes, 99+ RZ rear brakes.

I am considering getting a set of RPF1s in skinny(ish) sizes for DD use and possible high speed runs (not on the street!) later this year.

Basically, wanna know what my options are between:
17x8 +35, 17x8 +45, or 17x8.5 +40 up front
17x9 +35 or 17x9 +45 in back

In particular which (if any) of those RPF1 fronts will fit over StopTechs (I would think that either of the rear sizes considered should fit over 99+ RZ brakes?).

Fender clearance isn't going to be a problem, just wanna know what fits over the brakes. TIA!

Someone posted a great website to preview wheels on your car and they had the most insane selection of wheels I've ever seen. Does this sound familiar to anyone? The app even had ride height adjustment and tyre size. If anyone can point me in the right direction that would be great! I was using it to try and see what style would work best and if I could find the wider sizes like 18x10+22

easily with feed front fenders

Well I've read this thread over as well as checking out the excel sheet. I just want some verification on the setup I plan to go with.

'93 R1


18x9.5 +34 with 255/35R18 KDW's FRONT
18x9.5 +34 with 275/35R18 KDW's REAR


Based off what was stated earlier in this thread, the offset and wheel size for the rear is ideal without modification. As for the front, since the wheels have a slightly lower offset I can always get a small spacer for a proper fitment. Not a wheel expert at all and I'm still figuring these cars out as I go so any help would be great!

A spacer reduces the offset even further which is what you do not want. You will rub considerably with a 9.5 +34 front wheel. For a 255 front wheel I highly recommend going with at least a +45 offset if you want a 9.5 in wheel. Anything less than this will require a very big roll/cracking of paint ect.

Not only this but your listed wheel sizes will not fill the wheel arches equally either making it look odd. The front will stick out much more than the rear.

My recommendation...do more research before you buy.

Ok, I haven't committed to any setup just yet. I've been researching all over and hoped someone with experience would chime in here so thank you!

I have also been looking at a staggered setup

18x8.5 +35 FRONT
18x9.5. +35 REAR

Based on the excel sheet my offsets are right in that range.

Hey Flyweight. I totally agree with you on the wide bodies. Might consider a set of Feed front wide fenders but WILL NOT touch the rears. Anyways I decided to hold onto the bigger rims that won't fit 18x9 +15 and 18x10 +23 and actually just found the same rim style that will fit and wanted to get your opinion. The new rims are 18x8 +44 all around. I'm wondering if I used 2 of these rims on the front if I'd be able to use either of my old rims on the back. I may consider upgrading to the Stoptech brakes and also was wondering if they would fit with any combination of these. Thanks for any info.


-Chad

why not buy 18x9.5" +35 front and rear and run 245/35/18 tires all around. It will fit. Not many tire options in that size though.

you might be able to get away with a 255/35/18 but it will be close in the front but most likely do able. I would go with a medium width 255/35/18 tire...not a wide one IMO. (I am talking about rolled flat fenders here)

I see a lot of people going with pretty skinny widths on the front wheels...like a 8.5 or 9"....I suggest getting the widest wheel that can fit in the front and run a slightly stretched tire on it. The handling is much better than running a wide tire on a skinny wheel like a 255 35 18 on a 8.5" wheel or even a 9" wheel. I would run a 255/35/18 tire on a 10" wide wheel.