Manga_Spawn

18's have a lot of options due to a lot of Porches have similar size wheels so there is plenty of tires out there in the 295/30/18 size. There has to be wheels that are close to those specs though instead of widening them. I think forgestar makes some options that you get to pick your width and offset. If you figure you are paying $400 a wheel once you widen the Enkei's there are other options that are close in price that are better.

riceball777

What rim options do I have that will fit a 295/30/18 tire on a stock body s2000?

ZDan

3000+ lb. with driver is indeed *relatively* light for a car making 442 rwhp. A C6 Z06 makes about that power, and it's ~15% heavier with driver. I can't think of any "real-world" production cars that make that kind of power and weigh 3000 lb. with driver.

442rwhp at 30mph is 5525 lb. of thrust at the wheels if you could put it all down. That's asking a LOT! If you could put it all down, you'd be accelerating at 1.84g, rear tires would have ~2550 lb. load from weight transfer, so effective coefficient of friction would have to be more than 2.1. Not happening on the street! Maybe on drag radials, post-burnout, at a sticky-compounded launch pad at the drag strip.

At this power level, at this weight, on street tires on the street, wheelspin in 1st gear is just a fact of life. Going to 315s won't prevent it.

Regarding heat, I wasn't talking about temperature across the tire or camber, I was saying that *on the street*, a 315 might be at a slight disadvantage to a 275 because the 315 should run cooler. Of course you could run lower pressure though. Any case, 1st gear (and even 2nd with cold tires) on street tires, on the street, wheelspin is just a basic consequence of that power level at that weight. There aren't any tires that will prevent it.

riceball777

I would think a max performance tire that big should help greatly.

I use to run 255/40/17 and 225/45/17 rs3 and every time I hit boost in first gear the car would loose traction and there would be no forward acceleration. Now I'm on 255/40/17 in the front and a 275/40/17 in the rear and the differance in grip In both straight line and in corners in extremely improved. I no longer ever loose traction in first gear and the core nearing grip when I auto cross is also greatly improved.

It's time to turn the power up and I would expect a max/extreme street tire in 295/35/17 or 315/35/17 or 295/30/18 would also provide similar improvements in grip over my current 275/40/17

s2000Junky

Exactly why getting some more tire surface on the ground is beneficial. Its not rocket science here. More tire, more friction area, more adhesion before slippage. Run the right camber, air pressure and tire compound for the conditions to maximize what you have for the best shot at holding the power you have. The rest of the traction is achieved by your foot. Not worth over thinking it beyond this.

ZDan

Erm, not exactly. A 315 width tire isn't necessarily going to give you greater contact area in the first place, and even if it did, that doesn't guarantee more grip. It does on a sticky drag-strip launch pad, but not on coldish tires on the street.

Tires not heated up on the street, friction will not vary much if any with contact patch area.

If you do want 10% more contact patch area, you don't need wider tires to do it, it's as easy as dropping your tire pressures from 32psi to ~28psi. But again, on the street, not really buying you much if anything in terms of grip.

It is worth thinking about if someone assumes he's going to get ~10% greater grip for acceleration from 10% wider tires. He won't.

riceball777

A corvette zr1 and a mp4-12c both weigh about 3,000 points they both will Dyno at about 600whp with way more tq than my turbo s2000 will ever make. They are both rwd. They seem to grip fine with street tires from a 1st gear wot roll. Why do u think I can't especially with a lot less torque.

1nate7

A wheel designed for max tire width on a stock body S2000 will be a specific fitment and unique to our chassis only, a very limited market so most companies don't even offer these sizes. I don't think you will find anything off shelf that fits your needs. There are some JDM wheels (Work, SSR, etc) available in wide fitments with high offsets, but they will be custom order and probably a considerable wait time. This is why I chose to go with CCW. The price is comparable if not cheaper, about 1 month turn around and built to your exact specs. Your other option is to widen something like a NT03 (9.5" +40 would probably be the way to go, adding 2" to inside) which you seem to like, price would probably come out about the same.

ZDan

ZR1 with driver is over 3500 lb, makes 638 flywheel, maybe 550rwhp stock. Which is still a lot! It's also geared WAY taller, but I would hope it could smoke the tires in a 1st gear roll. MP4-12c is midengined and will naturally be able to put more power down having more static weight on the drive wheels.

My FD makes 463rwhp, weighs 2860 empty, 3100 with me and fuel. Smoking the rears on a roll in 1st is no prob... It did hook in 1st at its one trip to the drag strip.

At this power and weight, wheelspin on the street in 1st is a given if you keep your foot in it.

s2000Junky

ZDan, your clearly over analyzing this for the sake argument, but some of us have real world experience to help support us when we make our statements or recommendations. I know you have yours as well, but I question if its much in this particular arena. I appreciate the contribution and effort you put into your responses typically, but at the end of the day that doesn't always make them accurate.