Justin93

"I have a 91 rs with weld rims 10" wide in the rear, offset 3" outside and 7" inside. 295/50/15 fill wheel well nicely. you have to roll the wheel well up gently with a hammer an block of wood so it's not pointing in towards the tire or it WILL cut your new tires when you hit bumps. hope this helps..TAS.."

Original Post:http://camaroforums.com/forum/82-92-...can-fit-53566/

Im Starting this thread because there is a lot of dispute as to what is needed to correctly fit a larger rear wheel in our third gens, and this spec required no modification needed just proper Rim and Tire specs.

Now as to Why might i be trying to do this?
Quite easy.
Reduce sprung weight - Traction - Hooking out of pulls - Adjustment to Gearing
As im in the process of putting a 9" and require a dedicated tire height and aspect ratio to be able to properly determine my best suited Gear ring and pinion set.


why it's important to retain proper offset when
you change rims: tire not centered properly affecting
drivability (negative roll radius changes), bearing load,
rubbing on the struts or wheel arches.

In this thread off camaro forums, he stated that he was able to fit a 295/50/15 Wheel in the rear, and if this is achievable, Obviously the Rim size is 15" and the Width is 10" with a 5x4.75 Bolt pattern.
But in my learnings its wiser to start with the tire size desired then select a rim that is capable of holding that.

In his original thread he stated
3" offset inside and 7" outside

if anyone can elaborate this. it might be easier then im making it out to be but i believe if we could figure this out we can get closer into cracking out what
wheel specs he used other than that he stated.

Side Wall =148 mm (5.8'')
Section Width = 295 mm (11.6'')
Offset = What would be the required offset..?
What would be the Required wheel back spacing as well?


As for those ready to Knock down the thread and say 'its in the stickes'
well the tools are in the stickies: http://www.rimsntires.com/specs.jsp

I certainly tried using the Table for a while but couldn't identify the Offset or ET..

If anyone can lend

What is my Goal offset if i want to achieve a flush rather then sticking to far in/out tire?
Is this even possible ?

I need to figure out the Specs of the Tire as well as the back spacing or offset of the rim/tire to be able to duplicate tasinc Rear wheel fitment.

Justin93

Really? NO one can contribute experience or share knowledge of there larger tire direct swaps? Hell even if you had to modify your fender wells please feel free to chime in as when i get my 9" installed im going to want some taller tires in the rear and would LOVE to hear suggestions of what we can fit without modifying or if its a must for safety complication reasons PLEASE share your info.

I haven't payed close enough attention to the wheel set but i dont want to go anything over 18" and would certainly like some wider tires in the rear then the factory 8" width.
Can we fit 8.5-10" rears, if not what would we need to change to fit? which is more practical for daily driving and occasional track days (8.-10)?

HOPE TO HEAR YOUR EXPERIENCE OR KNOWLEDGE !

Ron U.S.M.C.

Wow,this is the first time I have seen a thread from a different site moved here.
235/60R15 = 26.1 Diameter
245/60r15 = 26.6 Di.
255/60R15 = 27.1 Di.
275/60r15 =28.0 Di.
295/50r15 = 26.7 Di.
If your going to stay with 15s and its primarily a street car I would not go any larger than 235/60r15 front on a 15x7in wheel and 255/60r15 rear on a 15x8in wheel.That set up will give you a nice staggered look with a slight rake.7in.wide front wheels give you just enough dish and the 8in. wide rear wheel gives you a nice deep dish. The reason I prefer that combo for primarily a street car is IMO the larger, taller 275/60r15 look like your ready to launch a 500hp car at the track and there's nothing wrong with that if that's what your looking for , and then there's the 295/50r15s that will not tuck without major well work and are total overkill "again" for primarily a street car with 15in. wheels


Personally I prefer the 235/60r15 on 7in. wide wheels front (26.1 di) and 255/60r15s on 8in. wheel rears.(27.1 di)
That gives me a 1in. taller tire in the rear in a respectable size and that IMO is perfect for a street car.

Justin93

Your running 7" in the fronts? That's 1" less than factory fronts.. I don't see how this would be something desirable?.. Wouldn't that contribute to over steer and loss of traction?

Im unsure, which is why im asking you.

I would like to fit my fender wells flush with my tires in the rear and get the front even with the rear so the only gap would be in the front if any.

I don't want to have a wheel set thats problematic on the road, im not secluded to 15" rims but it's hard to find anything wider then 8" for the rear that isn't 15"-16" or 20"+

Maybe someone has had better searches then i have that can supply some links/suggestions ?

As far as what is desirable i've come to terms it's probably not practical.

Just want the cleanest/best performing combination of rims and tires.. then again who doesn't want that?

Not secluded to 15" rims, that's just all i can find with desirable rear width. Even 9" rear Width would be nice.

Ron U.S.M.C.

Ok,
If I understand your question properly then no there's no problem with having a 7in. wide wheel in the front .A 235/60r15 tire fits it perfectly and is fairly wide. When it comes to building a car like mine with staggered wheels (that means a wider wheel and tire in the rear than the front giving you a shallow dish in the front and a deeper dish in the rear.)
Most guys that run 15in. wheels prefer a staggered look like mine with a taller tire in the rear to give them that old school 1/4 mile look. Just take a close look at the dish on the front wheel compared to the rear in this photo.Having 8in. wide wheels in the front will give you the same dish as the rear defeating every thing you are trying to accomplish with the old school 1/4 mile look I'm going for. This is really a 15in. thing.
Things can be done completely different when you start running Corvette style wheels in 17 or 18 in.

mmadden55

295 50 15 fits fine on with a 4.5 inch backspace if you roll the lip of the fender. 8 inch wheel will work but a 10 inch is better. I have 295 50 15s on the back on a 10 inch convo pro wheel.

Ron U.S.M.C.

Any photos ?

Bigchris20

Nice link!!

Orr89RocZ

iTrader: (20)

Lol at being worried about oversteer and traction with 15" drag tire sizes

If you are worried and want something that will fit with no problems, look into a 8" wide wheel and 275 tire. Tuck a 295 is doable just needs hammering of wells and maybe fender lip roll

As far as other sizes? There are billions of rims in 15-20" sizes that will fit these cars from 7-11" wide

Justin93

Wheels MAKE or BREAK the cars look, but more importantly then just the looks there's performance (unsprung weight etc) and i just want the most outright best setup for my practical daily driving.



I would like to avoid the use of spacers and if i get wider rear tires they will sit a little more out but this is what is desirable in my opinion for my vehicle, just not over the top. Is it still achievable with wider rims without the use of spacers ?



So what should i look for in a rim set in specific 5 x 4.75" (5 x 120.65 mm) bolt pattern, Lug nut size is: 12 x 1.5 but i don't know what my car requires for back spacing, offset, width and diameter - what am i looking for?.. that's the part that is getting me stuck in my searches. I can find a billion rims with that bolt pattern but wont mean that they will fit let alone with or without need of spacers.


Is there something im forgetting to consider?....

Maden i'd love to see some pictures of your wheel sets too!

When i find out what specifics i need to look for in my rim i will then use the link i provided to identify tire fitment. If anyone can share what i need to look for to have my rim set fit without spacers front and rear and still have that staggered look Ron USMC has on his third gen, im not secluded to 15" but don't want anything bigger than 17"(fronts) 18" (rears) but what do i need to look for when searching for rims to make sure they will fit as is without spacers? If this isn't even possible without spacers could you explain why i need spacers ? Front and rear specs im sure are slightly different off sets so i'd like to keep this into consideration when also seeking rim sets.

Thanks guys, im trying to learn not just ask other people for opinions as that would last forever, so all your information and suggestions will widely be appreciated and feel free to criticize my opinions or inputs with experience or suggestions as i am the pupil and am trying to wrap my brain around the limiting factors to what will fit on my third gen and not without spacers preferred.

cosmick

For a 10" wheel to be 7" in and 3" ut would require a 7.5" backspacing, which I really doubt can be made to fit, even with the mods we normally do to fit 17x11 wheels with 315/35 tires. Unless he swapped a 4th gen axle or was not referring to a third gen. You can buy 15x9" wheels, and they may be offered with a 7" backspace, and you can run a 295/50 on them. But there are an awful lot of threads here about fitting 10s on the rear, most with 5.5" to 6.5" of backspacing. 5.5" may stick out a little, but is cheap, easy, and somewhat safe in some regards. 6" seems difficult to find at any cost, and 6.5" requires some butchery, same as you'll find in the 315 on 11" threads. And BTW Justin, stock 15" were always 7" wide, 15x8s were never factory offered for these cars. The only factory 8s for any thirdgen were 16"

Orr89RocZ

iTrader: (20)

I would say any 8" wide wheel, get a 4.5" backspace or so. Thats a +12-13mm offset
9" wide, typically 5-5.5" backspace. Thats a +12-25mm offset
10", i'd say 6-6.5" backspace. Thats 25-37mm offset. The higher offset will move tire closer to inner fender so it wont stick out past the outside lip as much, but may have issues with inner well clearance. May have to lightly hammer.

Those higher than 5.5-6" backspacing may start to get into spacers/adapters. You can run less backspace but they wont fit under fender lip

I wouldnt go any wider although you can get 11 on rear. Fronts leave it under 9" wide

Rough guidelines, play with dimensions as necessary to see where wheels line up

Excellent link here
http://www.skulte.com/adapterfaq.html
According to this, do not exceed 5.85" backspacing rear and 5" front but depending on width, it may stick out

paul_huryk

We sell 9.5" wheels to fit the front - they have 5.25" BS and will not contact the tie rod ends, rear has enough room for another 1" (at least) BS on a 1" wider wheel.

A 295 tire needs a 10" wide wheel, 8" will make it bubble out - less traction and stability at speed will be side effects.

I would seriously look at a 17" x 9.5" wheel set for all 4 corners on your car. With those you will be able to fit a 275-40-17 all around, which makes for better handling, braking, and looks (subjective). There are quite a few DR choices in 275-40-17 too.

cosmick

No, an 8" with 4.5" BS is zero offset. BS includes the lip. But lip is not included in the width.

cosmick

For a 35-series, yes. But not for a 50-series. The extra sidewall makes a difference.

cycleguy04

Is your rear wheel a 0 or -19 offset?

Ron U.S.M.C.

15X8 rear wheel
Offset -19mm
BS 3.75
The AR-23 American Racing wheel only comes in that BS for 15in wheels.
Any wider tire than the 255/60r15 on that wheel will stick out to far for my taste .That's fine because I love the combination I'm running now and would not change that.

Ron U.S.M.C.

Heres why I'm so sold on the sizes I have now.
I tried a set of 295/50r15 on my car with that wheel and once I came to my senses promptly removed them. Wayyyy too much tire for a 5.0 stock engine street car.
(the hood gap has been fixed)

cycleguy04

No problems with contacting the control arms? I found a 15x10 wheel I like that only comes in 3.75 backspacing. The 295's with that wheel would stick out pretty far I'm guessing.

Ron U.S.M.C.

Heres a shot showing a 295/50r15 on a 8in wide 3.75 BS wheel.
The 10in wide wheels rim would be at least even with the flair.I believe a 10in wide wheel would allow the tire to set properly also allowing the bulge and tread to widen a little. Its going to stick out even more than what you're seeing in the photos.