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

 

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.

 

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

 

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

 

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:










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.