xtra wide wheel positioning.

**bossho** · 09-22-2009, 10:00 PM

I was wondering if anyone here was familiar the feasibility and performance factor of putting an extra wide rear end on my 98 T/A. I love the look of the wide tires but 1-2" spacers simply are not enough, I'm trying to find out if there;s anyway (thats safe) to put in a rear end that my tires come out 6 or more inches from the rear wheel wells (maybe rear end that is about 12" wider than standard length), this would also allow for much wider tires on the rear. I may even consider this for the front also, I'm sure it would be amazing for hugging corners if done properly. I'd guess the rear would be less work than the front but any input on widening front axle would also be greatly appreciated.

**Cutlass** · 09-23-2009, 03:27 AM

Are you serious? I think that would look a little strange?

**TRANS-DAD** · 09-23-2009, 10:36 AM

OMG!!!!! (mental picture)............Please,....please don't do that to an F-body!!!!!! LOL!!

**shady milkman** · 09-23-2009, 10:45 AM

weird..what you are asking for is unique..i dont think it can easily done or safely

**Smittro** · 09-23-2009, 11:01 AM

Originally Posted by bossho

I was wondering if anyone here was familiar the feasibility and performance factor of putting an extra wide rear end on my 98 T/A. I love the look of the wide tires but 1-2" spacers simply are not enough, I'm trying to find out if there;s anyway (thats safe) to put in a rear end that my tires come out 6 or more inches from the rear wheel wells (maybe rear end that is about 12" wider than standard length), this would also allow for much wider tires on the rear. I may even consider this for the front also, I'm sure it would be amazing for hugging corners if done properly. I'd guess the rear would be less work than the front but any input on widening front axle would also be greatly appreciated.

How are you gonna get around the tires rubbing the fenders?

**bossho** · 09-23-2009, 11:53 AM

Originally Posted by Smittro

How are you gonna get around the tires rubbing the fenders?

I've been considering going to a 21" rear rim for my 98 T/A

I was thinking the the new Pirrlei Pzero nero "supercar specific" tire - the 375/20/21 would look amazing.

Whilst a 375 on the back sounds great I am a little worried about the overall diameter and rolling radius.

According to my calcs the gearing will drop - which I know might actually be a good thing.....but I am more worried about the ride height and size of the wheel in the wheel-well/arch.

The stock tire is 28.9" tall - the "new" Pirelli is 26.9" tall - so I lose 2" off the overall diameter and 1" of ride height! My car has coil overs fitted so I guess I can adjsut it to suit - but I don't want it looking like there is a foot and a half of fresh air between the tire and the arch - and what about that lowered ride height (car is already 1.5" lower than stock at the back)

So whats the thinking on this - is it within acceptable limits?

**JaycenK** · 09-25-2009, 05:02 AM

Guys he is talking about bringing the face of the rim out 6 inches so the damn thing lines up with the top of the rear fender or out further. Thats not odd. What he does not understand is that it can be done with the correct rimm offset and spacer.

You don't need a wider rear. all you need is the right wheel and maybe a spacer. guys put 12 inches of ruber out back with out changing the housing length. If you go to a huge wide tire you will need to flare the fenders because you will have no way for the suspention to travel, and you DO NOT want a huge wide tire up front. It will drive like shit.

Why in the hell would you want a 21inch rim out back you would break the axle or destroy the rear.

**Fury_786** · 09-25-2009, 10:11 AM

-1 cool points

**JaycenK** · 09-26-2009, 03:36 AM

Originally Posted by Fury_786

-1 cool points

really lol

**Mean Green Z28** · 09-26-2009, 01:15 PM

???

or

???

lolz

**mark21742** · 10-04-2009, 10:23 PM

I agree with Jaycenk, the best/only way to do this is with a deep dish wheel.
hell I have a widebody goat andtest fitted a set of 15x10 old school deep dish Cragers on it last weekend and even with the widebody they still stuck out passed the body!

**bossho** · 10-05-2009, 07:55 AM

Originally Posted by JaycenK

Guys he is talking about bringing the face of the rim out 6 inches so the damn thing lines up with the top of the rear fender or out further. Thats not odd. What he does not understand is that it can be done with the correct rimm offset and spacer.

You don't need a wider rear. all you need is the right wheel and maybe a spacer. guys put 12 inches of ruber out back with out changing the housing length. If you go to a huge wide tire you will need to flare the fenders because you will have no way for the suspention to travel, and you DO NOT want a huge wide tire up front. It will drive like shit.

Why in the hell would you want a 21inch rim out back you would break the axle or destroy the rear.

your right - i did a little bit more homework and anythogn over 18 is tooooo much metal and not enough rubber so im sticking with 16's or 17's out back just wider - thanks for the input on the deepdish, offest & suspension travel considerations

**mark21742** · 10-05-2009, 09:10 AM

Originally Posted by bossho

your right - i did a little bit more homework and anythogn over 18 is tooooo much metal and not enough rubber so im sticking with 16's or 17's out back just wider - thanks for the input on the deepdish, offest & suspension travel considerations

also something to think about.
if your wheel/tire stick out passef the body, you will want a minimum of an inch of suspension travl to mantain a decent ride quality. you would want to take the springs out and fab a set of bump stops that will keep the quarter just off the tire, then put your springs back in.....that you can be sure to have tire/ body clearance at all times

**Benner** · 10-05-2009, 10:03 AM

17x11's are about the widest you want on the street. They line up great on the fenders and fill out everything rather nicely. Throw some 315/35/17's and your set. Any wider and your traction gain doesn't really give any advantage because of the weight you run into. 17x11's with 315/35/17's are pretty damn heavy as it is.