well i had to do it.. so i dont know man i was rubbing likesick with Stechs

 

beause with your setup the edge of your tire is 16mm further out than my setup. also, my rears have a pretty agressive camber.

just to give you an idea, i cannot even fit my pinky finger between the fender and the tire

 

question: i know this has probably been asked about 9 million times but will 9.5" on 275/30/19's fit in front with say a +40 offset? +35?

 

you'll rub unless you roll.

 

I have s-techs and 19x10 in the rear and have no rubbing issues, but my offsets are different.
Check my sig for wheel and tire and offset information.
I also have a couple degrees of negative camber in the rear. I don't think I need it for anything, I just like the way it looks.
I am going to zero the camber out of the rear though in a couple of days, so I will let you know if I begin to rub afterwards.
I just got tired of buying rear tires every year. In fact, I just got some new Falkens yesterday. After two sets of Nitto NT555 Extreme ZR's I decided to try something new.
That reminds me I need to change my sig.

 

jimmy_jammy

I have got some 19" wheels. So please allow me to explain my own findings.

First: why? There are only two reasons to get 19 inchers. One is looks. The other is to accommodate larger brakes. That's it. You're not going to get better handling, grip or anything else. There aren't many reasons to need such huge brakes on an RX-8, so I'm guessing that like me you're getting them for looks.

Second: handling. The RX-8's principle strength is in it's handling. It will corner amazingly quickly. A great many cars with more power cannot keep up with an RX-8 in the twisties. Mazda spent thousands of hours getting the handling to where it is and the balance is perfect. So, if you're going to put 19" wheels on for the looks, you want to minimise the effect it's going to have on the balance of the car. To that end I chose to stay with the same wheel and tyre size all round. Also I kept very close to the offset of the stock wheels to a) minimize any effects on handling and b) so as to not introduce any undue stresses on the suspension components. Furthermore, keeping the tyre size more or less the same will keep the grip progressive and forgiving on the limit. If you were to go for a much wider tyre, you will get more grip, but the car will be more prone to "snap" on the limit and at that point the car will be carrying much more energy, meaning that any resulting accident will be bigger.

Third: Performance. Some have suggested that the car will be more sluggish with 19 inchers. There's no avoiding the truth of basic physics. However, provided you don't choose an outrageously heavy style of wheel, I doubt you're going to notice on the road. In a measured lap round a track, a performance difference should show up if you're a consistent enough driver. But I'm guessing that if you're interested in 19 inch wheels anyway, you're not someone who's going to be competing in timed events.

As a result of all this reasoning I chose to go with Advan AVS Model 5 rims 19x8jj ET+45 wearing Bridgestone RE-050A 225/40 R19 tyres. (I did want 245/35 R19 tyres, but there were no RE-050As around in that size). My '8 still corners beautifully on it's stock suspension and is still nice and quick. I can confirm that the shorter tyrewall height does result in a noticably crisper turn in.

Hope it works out for you.

Enjoy.

P.S. This is mine (I've gotta get that plate moved):

 

A very reasoned and sensible choice you've made. I think you're 100% correct on every point and they certainly look beautiful, don't they? Keeping the wheel & tire width down definitely minimizes any performance hit. How much does the wheel weigh?

I've gone the opposite to 17"x9" wheels and found they seem to boost performance on track and make the ride more civilized on the street at the same time.

Good job!

 

You know, I knew someone would ask me that sooner or later. When I got them, I did weigh one. But can I remember what that weight was? No. I remember thinking that it didn't suck though, and was in fact quite good for a 19 incher.

 

Bunique & Punishr...

Im interested to see pics of your rear rims setup...care to post some?

 

See Sig for 19" - Aggressive Offset Staggered.

 

I'll get some better pics up later, but for now this is what I've got.

Tenzo Racing Sports GF7 19x10 - 19x8
Toyo T1R 275/30/19 235/35/19
Tein S-Tech springs

 

i weighed my 19x8.5s (model t5s) and they came in at 19.5 ish lbs pre TPMS or anything.

 

mine are 19's, and other than some insane understeer I've had no issues, I would like to go bigger tires though as that may even help the front a bit, mine are in my sig as well, hyper agressive offset (+36, +29), tiny tires painted on etc. :D

 

I have 19" staggered lightweight wheels with aftermarket sways, coilovers and some extra bracing.

My goals were:
1. Eliminate the excessive stock body roll.
2. Eliminate the wheel hop on hard launches.
3. Eliminate the excessive movement in the rear suspension.
4. Add grip for driving in the kettles (very hilly, tight turns, speeds in the 30-110mph range).
5. Looks.
6. Keep the suspension/wheel upgrades under $10k not including brake upgrades.

Good:
1. Everything fits fine, I only have to watch out for some driveways.
2. Handling is not worse, it's better. I have absolutely no issues keeping up with a stock 8 on turns. If anything they get in the way because they are slower through the turns. I have an easier time accelerating in turns than a stock 8 due to the extra rubber in the rear.
3. Balance is not at all upset, if anything it's better. The car is still very neutral and it's easy to put it into a 4 wheel slide on a turn or give it a little gas to induce oversteer.
4. I no longer have wheel hop in the rear.
5. The rear no longer lifts when braking at the top of a hill on turn entries.
6. The body roll is under control.

Negatives:
1. I have to apply slightly more pressure on the brake pedal. I think this is just a feel difference not a performance difference but I have not had a chance to verify that.
2. Limited tire rotation options but the tires have such a limited tread life it doesn't really matter much.
3. Harsh ride. Several hours in the car on normal roads can be fatiguing. I'm ok for about 5 hours, after that I need a break. I avoid really bad roads if I can.
4. Cost. Good, light, multi-piece forged wheels in 19" are quite expensive. Mine were over $5k.
5. Good 19" tires are expensive.
6. I don't put adults in the back seats anymore. I'm not sure there is enough suspension travel left to handle the weight.

Things I would have done different:
1. I would have bought a higher grade of coilovers that allowed for both compression and rebound adjustment. This would have meant I would have been in the 2K range for them. The current setting I use is great as long as I don't hit one of those spots where you have a seam in the road that has raised up due to expansion. The car tends to crash over those and I can't adjust easily for that without changing characteristics that I like.

Would I buy 19" staggered wheels on a car with lowering springs/shocks? Probably not, but I would with a setup that has a reasonable amount of adjustability. If I was only looking for performance I probably would have gone with lighter wider 18's.

 

Dinhx8, do you have more pics of your car? Those wheels look very nice, and I'd be curious to see the stance of the car with the MS suspension setup.

 

here ya go

https://www.rx8club.com/rx-8-multimedia-photo-gallery-6/got-my-advans-mounted-pics-118462/

https://www.rx8club.com/rx-8-multimedia-photo-gallery-6/labor-day-%3D-clay-bar-day-125994/


also there are i think 2 or 3 other forum guys rollin on the Model 5s/T5s.
Celronx has the original Model 5s on Tein s techs I believe...