Which tire size looks better.... 305 vs 315. Pic inside
 

What do you guys think? Deciding if I should go back to 315's. I switched to 305's for a bit more sidewall but with the tire being about 1" taller it rubs if I lower it anymore than the picture.

Car is RWD so rolling diameter doesn't matter.

Thanks!

- David


*** I went with Michelin Super Sports 305/30/19 & 235/35/19. Pics are on page 3 ***

*** Another shot of the 315/25/19 Toyo T1R is on page 4 to give you another look at the 25 sidewall ***

I'd go with the 305. Looks great!

If it's a show car, 315 looks good but the tire choice is horrible. If you want a quality tire, you need to get the 305.

+1...

for street duty the taller tires will survive longer but the 315 looks good

I prefer the 305.

I like the 305's. Great looking car :)

I prefer 18"

325
 

I like the 315 better...

I just removed my almost new Michelin 235/35/19 and 315/25/19 PS2s and replaced them with Bridgestone 235/35/19 and 305/30/19 N1 RE50As. The Bridgestone 305 is substantially wider than the Michelin 315.. My car is RWD/LSD.

Have any pics of the fitment? How do you like the 305?

Thanks for the kind words! :D

How much have you lowered it already? How much more do you plan to go? I have 305's on mine and prefer them over the 315's. I'm at stock ride height and plan to lower it, but am worried about rubbing. Thx. Sorry for threadjacking.. Oh, my vote =305's.

When I get back in a couple days I'll measure how tall the tire is and how high my fender is off the floor. I don't rub at the height I'm at and am at almost full droop on my jrz shocks.

i too went from 315 Toyo to 315 PS2.
PS2 is a fatter tire than Toyo and looked better

However now i have 305 PS2 is prefer the Ride and Look as well

this is on a 11.5" Wheel

One is short and one is tall you know. But the taller both looks better (meatier) and will work better I agree.

Sam

I like the 305, its just meatier looking on the back. Sort of drag-racer-fast-larger-tire-on-the-back meatier, if that make sense :)

You do get a little more contact patch and conformity too as well as gearing. Helps with big power.

I had the same problem with my setup after I bought my Champion RS98's and I couldn't find 315/25/19's anywhere :mad: . I went to 305/30/19s and it took a while to get used to it but after a while when I found 315/25/19's again and put them back on...the 315's looked skinny!
To answer your poll, i think the 305's actually look better. I am lowered 1" and have no rubbing issues on the rear. The front is another story though. Because I had to up my size in front to keep the revs between the front and rear in sync they do rub quite a bit when turning too sharply.

What is your goal for this choice? You thinking purely cosmetics when parked? Or are you considering ride quality, and possible damage to the wheel from potholes?

If it's just for show, then the 315 is probably the clear winner. But I would much prefer the taller 305 when actually driving the car. Actually, I might prever a 315/30R18, but I doubt that's an option your considering.
-Dan

I prefer the 305s, in terms of both looks and performance. But looking at the responses here, it's clear that people's opinions vary. That includes yours - so get what YOU like and drive the hell out of it! It's gorgeous.

-V

Man I've loved your car for a long time! The look is beautiful with the C93's on it. Personally speaking I think the meaty look of the 305 looks killer on your car; it seems to have a more purposeful look and I bet the ride quality is much better too. Who cares about ride height?? - Go for functional sir. I think either way looks good but 305 looks even better!

Chris.

Ascetically I would go with the 315 because it matches the front set up.

Everyone has some valid points - just guess its to whatever you want to achieve.

This may be a dumb question, but how can the width of one tire mfr be different than another? 315mm=315mm, correct? And to that point, how can a 305 from one mfr be wider than 315 of another?

Any insight is appreciated because I am in the process of buying all new rubber and I am kind of torn on what to go with.

Have no idea but the Bridgestone RE050A N1 305/30/19 is almost an inch wider that my 315/25/19 PS2. The Bridgestone sits much more square in the same 19x12 rim than the PS2 which was much more pinched. I wish I would have taken a picture with the two tires side by side.

I'm not an authority on the matter, but I believe the number one would compare would be the section width listed for the tire, not the tread width.

I've noticed the section width listed for the Bridgestone N1 tire is 12.6" compared to a regular Bridgestone RE050A at 12", which means the tire is actually a 1/2" wider.

But I am trying to find out the section width on the PS2 315

Comparing one manufacturers sizing numbers to another manufacturer is pretty meaningless.

So Michelin 315mm does not equal Bridgestone 315mm...?

Clearly not...

Hmm, ok. Section width. Got it. So how did you like the Bridgestones?

While I would agree with you on this in regard to the tread wear rating, The section width is a measure of the tire from sidewall to sidewall. Of course, this number is subjective to the size of the wheel it is installed on... Did you mount the Bridgestone on a 12" wheel? - If so I'd be very curious to see a picture.

Chris.

I really like the Bridgestones RE050A N1s in 235/35/19 and 305/30/19. I went with this size because my car is RWD and thus I'm not limited to the 315/25/19s you have to run with AWD. I just put my street wheels on my car and drove about 15 miles on them so they are brand new but they seem very smooth, quiet and provide a nice ride. I can't really say that I can tell much difference between these and the PS2s in 315/25/19 but then again its been close to 6 months since I had the street wheels on the car so don't rally have a back to back comparison. I do know that comparing the tires with the PS2s, the RE050As have a much stiffer side wall. I am used to a much harsher ride with my track wheel set up as I had left my 18" track wheels with NTO1s on the car since the end of track season. The RE050A (especially the rears) are wider and sit more square on the rim compared to the PS2s which were more pinched. Also, at just under $1300 installed they are a deal for a Porsche spec tire. Below are pictures of the tires on the car. Wheels are 19x9 front and 19x12 rear..

RE050A angle view | Flickr - Photo Sharing! RE050A angle view | Flickr - Photo Sharing! by pwdrhound1, on Flickr

RE050A side view | Flickr - Photo Sharing! RE050A side view | Flickr - Photo Sharing! by pwdrhound1, on Flickr

RE050A front | Flickr - Photo Sharing! RE050A front | Flickr - Photo Sharing! by pwdrhound1, on Flickr

RE050A rear | Flickr - Photo Sharing! RE050A rear | Flickr - Photo Sharing! by pwdrhound1, on Flickr

RE050A rear view | Flickr - Photo Sharing! RE050A rear view | Flickr - Photo Sharing! by pwdrhound1, on Flickr

That setup looks awesome - but DAY'UM! Check out those grilles! Are those the Rennline ones installed? I ordered and have mine already, and I haven't even taken delivery of the car yet!

I'm also going to need to get new rubber all around on the 19" wheels that come with the car. I want to go as wide as possible while not requiring mods. Any suggestions?

Just a bit eager...
-V

thats just an awesome car i liked it a lot i wonder how much you have spend on it while purchasing it??

Those are not the Rennline grilles. They are the grilles that come with the RUF bumper. The rear tires are a super tight fit on 19x12 ET44 wheels. My fenders are rolled like on the GT2 and the inside of the tire clears the fender liners with about 1/8" of clearance. There is no rubbing however.

I am the 2nd owner. The previous owner sent the car to RUF for the complete Rturbo conversion which according to the invoices from RUF came to just under $60K. That includes the following RUF parts: Engine ECU, Hybrid K24 turbos, turbo intake pipes, intake manifold, fuel filter, exhaust w/ 100cell cats, clutch, suspension, wheels, wheel studs, spacers, front and rear bumper, rear spoiler, front strut bar, 350mm brakes and 6pot calipers, pedals, door sills, shifter, mirrors, floor mats.

Since I purchased the car I installed the Euro GT3 seats, Tequipment roll bar, 997 GT2RS Intercoolers, JRZ suspension with 600/800 rates, GT2 fender liners, 996 GT3 Cup front brake ducting, 996 GT2 rear brake ducts, 997.2 PCCB caliper brakes with 380/350mm front/rear rotors, and the larger 997.2 GT3 brake master cylinder. The car is RWD and I also had the diff replaced with a Guard Club LSD and added a transmission cooler. There is no PSM so it's a lot of fun at the track but the car can bite pretty hard if not careful. I don't drive it much on the street.

You don't by chance have a picture of the rear wheel with the 315/25/19's installed do you?

Chris.

Actually, I did dig this one up with the 315/25/19 PS2. It may be hard to tell in the picture but the tire is definitely slightly narrower and more pinched than the 305/30/19 RE050A especially considering that the rim protector portion of the tire is less pronounced on the PS2. If you look at this picture and compare it to the 2nd pic in post #32 you will see that the Bridgestone is much more "square" on the rim. The fronts are pretty much the same for both the PS2 and the RE050A.

https://www.6speedonline.com/forums/...ine=1361818536
RR pic 315:25:19 PS2 by pwdrhound1, on Flickr

Thanks for all the help everyone. I decided to go with the Michelin Super Sports.

305/30/19 & 235/35/19... I got them for a $1300 out the door w/ tax and installation through Evans Tire in San Diego.

Ran into a cool orange car in the parking lot as well!

- David

One last pic on the way home from work :D