I'm looking at getting the rear 17x11 Weld RT-S S71. I want to do a 315 rear tire. I have seen a lot of posts with this setup and everyone says it's possible on the 4th gen Camaro maybe with rolling the fenders a little or some BFH? My car is a 98 Z28. Stock height, stock rear end. The Weld rep told me it's not possible without minitubbing my car. What is the correct scenario? Thanks in advance guys.

 

315's are probably doable on a 17X11 with the right backspace on the wheel.

A sales rep saying it isn't doable doesn't mean it can't be done either. I had a guy at Aeromotive tell me that I could not run mechanical gauges in the triple pillar for the 4th Gen car and that I needed to stick to electrical ones. Boy was he wrong. I have fuel pressure and oil pressure which use steel braided lines and got it to work. With the fuel pressure you have to get a fuel isolator kit because you certainly do not want fuel getting inside the cockpit. It's a braided line filled with antifreeze that goes to the gauge not fuel.

 

Ok I was just wondering because that threw me off a little. I've never seen anyone here that said they had to minitub for this setup.

 

 

What am I missing here? 17x11 is a well understood and done many many times since the beginning of the 4th gen.

yes rolling fenders and massaging the inner fender well is frequently necessary.

anyone telling you it’s not possible hasn’t been into the 4th gen game very long.

 

I recently placed my order for set of S71's for my 2000 TA WS6, stock height suspension, Baer GT Front brakes, dealt with same exact Weld Salesperson - final sizes:

WELD Wheels S71 3PC Forged, Polished/Black
17x9.5 RT-S 5x120.65 BC, 7.3" BS, +52MM OS, 3.18 ID, Medium Pad
17x11 RT-S 5x120.65 BC, 7.8" BS, +46MM OS, 3.18 ID, Medium Pad

Using existing 275/40-17 Front & 315/35-17 Rear tires

I already had similar setup installed with the American Racing TTII's

Fronts were never an issue in any way, for the rears I did have to initially perform the BFH mod to small area lower/front of inner fender panel, cut off the bump stop ears, & install an Adjustable Panhard Bar to properly center the rear end (which btw was not centered using OEM bar)
After those mods for rears, I never had an issue & the tires are flush with fenders. As a disclaimer I never haul anyone in rear seats as I have full roll cage...

Now IDK, whether there is a difference in how Camaro vs TA fenders are formed that might lead him to make that statement, but no fender rolling & definitely no mini tubbing necessary for me??

 

Yes that's what I was thinking. All that seems about the norm from everything I've seen with several running this setup in TA and Camaros. The rear wheel spec you stated is the same one I had saved but didn't order yet because of what he said lol. I'll just order and do what I need to. The small normal modding if needed is ok. Highly doubt I need to tub it. Thank you!

 

I'm not sure. It was a Weld wheel rep that told me that I needed to tub my car. They have the specs for our cars on the site and even there it says possible minor trimming needed only, if needed lol.

 

The necessary offset is listed here
https://ls1tech.com/forums/wheels-ti...must-read.html

Wheel Fitments

The numbers in the columns are as follows:

WIDTH ..... OFFSET ......... WIDTH OF TIRE
REAR Only

10.0" ... +38 to +54 mm .... 275, 285, 295
10.5" ... +38 to +50 mm .... 285, 295, 305, 315
11.0" ... +45 to +56 mm .... 305, 315, 335

NOTE: 315 series tires DO NOT fit 9" or 9.5" wheels. It will not be discussed any thread posting will be edited, locked or deleted.

PLEASE READ @ 315's

 

First off, thank you for the post. I had not found a good list yet of what tires size would fit on what rim size.
Second, I never replied back to you in Dec on my thread. Whoops, sorry and you where right.
Now my question for here is, what are GOOD Street tires for the 17x11 Rims?

My 2001 WS6 M6, running the standard 275 tires. With TC turned on, it takes me a little bit (not much) to slide the *** end around.

The 2000 WS6 A4 (which we posted on in Dec) , has Nitto NT555 315/35ZR17. These tires slip and slide all of the F'n place. I can not make a left or right turn, with good acceleration, without managing the *** sliding. Even just a quick straight line, take off and these things are sliding, and lets not talk about a wet road. These tires half 6mm of tread left on the, which is around 50% of their life.
Now, the car was owned by and older guy, garage keep, 65k miles when I got it. I guess these tires could just be a bit old.

What tires would you recommend for daily driving? I have not yet done the Adj Pan and control arm mod, yet (spent to much money at Christmas), so this could still be the issue too.
Does not seem to be a lot of tires for this 315/35R17 tires available anymore.
With your post, you have me thinking of dropping down to a 305.

 

The selection of 315/35/17's has unfortunately slimmed over the years, as 18, 19 and bigger sizes have become more popular. I run Michelin Pilot Sports 4's, which are expensive, and I also only drive the car in nice weather. The Pilot Sport 4's are an all season tire and are rated highly for driving in wet weather.

315's, other than looks, have been less impressive to me in terms of grip. I ran Goodyear GS-DS3 until they were discontinued, other than the look they were not a spectacular tire and you could break them loose easily.

 

Tire choice will always be different for everyone depending on how you plan to use the car. In my case I live in PA where quite frequently the temps can swing from down around 40deg or lower in early morning or late evening to 70's during the day - which is around the limit as to when tires such as the Nitto NT555 G2, or any other strictly Summer Performance tires are supposed to be driven safely.

I use my car mainly for street nowadays or shows - some of which take me on long drives to other states where I might be caught in a rainstorm deluge. For that reason, a tire with specifically good Wet Traction, decent Dry Traction & Treadwear is important. Noise for me is not a factor as my LT headers back thru GMMG chambered exhaust & Kenwood HU is plenty loud enough to mask any road noise...

Tire Rack is your best source for choosing tires - they afford performance level ratings, reviews, real life comparisons of different tires & a wealth of specs/info as to sizes, suggested rim sizes/rim width ranges, etc.

They allow you to search by size & plug in different sizes for front/rear to see all the mfg that sell matched sets (I like to stick with 1 mfg for both front & rear)

TR show basically (3) street type tires available (Michelin, Nitto, & Toyo) Others are dedicated Track or Drag tires.

In my case I chose/use the Michelin Pilot Sport Ultra High Performance All Season 4 over the Nitto NT555 G2 from consumer surveys (and my previous experience with Mich tires on all my BMW's)

PS4 275/40 Rim Width 9-11" 315/35 Rim Width 10.5-12.5 Y Spd rating = 186mph
WetDryComfortTreadwear 8.4 @ 540AA w/45k mile treadwear warranty

Nitto NT555 G2 275/40 Rim Width 9-11" 315/35 Rim Width 10.5-12.5 W Spd rating = 168mphDry Traction 8.5
Wet Traction 8.5
Ride Quality/Noise 6.5
Treadwear 5 @ 320AA & no treadwear warranty

All in all, pretty equal tires in many respects except for the cold weather driving capabilities & tread life which is one reason I went with the PS4's. Back in the early days I did have 15" wheels for the rear with Hoosier DR radials

I've known people that choose their tires based strictly over whether they like the look of the tread pattern

 

Yeah, I was on Tirerack before posting. I was hoping there may be other tires out there I was not finding. My best luck for tires on my 01, where Coopers, sadly it does not appear they make our size anymore. I had a set of Michelin, was not a fan, and had to replace in 2 years, less then 20k miles.

Now I am dabating, just finding a new Rim and going back down to stock size in the rears.

 

You can absolutely fit 315's on 17x11 wheels on a 4th generation Camaro. That's what I'm running on mine. I didn't need to hammer anything or cut anything. The only thing is the bump stops may be a problem, but my were so worn down that they aren't interfering with anything. My suspension is nearly stock. I do have aftermarket lower control arms and an adjustable panhard bar but that's it. Rear end is stock and I'm not running any spacers and I didn't have to roll my fenders.

 

I like TireRack too and have ordered from them many times but, unfortunately, they don't quite have the selection that Summit does. Specifically, they don't sell the Mickey Thompson Street Comp line (which includes a 275/40 & 315/35 in a 17" diameter). M/T Street Comp is another great option and will likely be the next set of tires for my '98 whenever I finally get around to buying a set:

https://www.summitracing.com/parts/mtt-6278

Haha...I am guilty of this, especially for a show car. On my daily driver I also have & really like the same Michelin Pilot Sport Ultra High Performance All Season 4 that you have, but the sidewall and tread of the M/T tires just look more pleasing to me so that's probably what I'll get for my Camaro. Appearance means a lot to me for that car because I spend more time looking at it than driving it, so tires don't get changed often on that one. For example, it's current tires are from 2005 but I've only put about 5 or 6,000 miles on them in 20 years.

 

Thanks for the info. Odd that Summit has Tires on their site, that the Manufactures do not even list. I will take this as a win, buy now and downgrade my rims on the next pair of shoes.

 

What wheels are you running and do you remember your specs for the rear wheels as far as backspace and offset?

 

Im not running Welds. But, I went with a 7.75" BS out back with a 315 and didnt roll or hammer anything. Clearance inside is perfect and touches nothing. Still havent had an issue contacting the fender lip either.

 

Looks great! That backspace is pretty much what the Weld's are, coming in at I think 7.8

 

sounds good.