Suspension and Chassis Questions about your suspension? Need chassis advice?

how wide can i go?

Thread Tools
 
Search this Thread
 
Old Feb 1, 2009 | 08:51 PM
  #1  
sab's Avatar
sab
Thread Starter
Junior Member
 
Joined: Jan 2009
Posts: 22
Likes: 0
From: alliance, ne
Car: 88 Firebird
Engine: 406 small block
Transmission: 700r4
Axle/Gears: stock posi
how wide can i go?

does anyone know the widest width of tire that'll fit under the rear without rubbing issues and without fenderwell modification? i wanna use a tire thats about 27" tall on a 15" rim
Reply
Old Feb 1, 2009 | 08:56 PM
  #2  
Stippy17's Avatar
Member
iTrader: (6)
 
Joined: Jan 2008
Posts: 474
Likes: 1
From: Pittsburgh, PA
Car: 1986 Trans Am, 1985 Trans Am
Engine: 400 SBC, H.O. 305
Transmission: TH400, 700R4
Axle/Gears: 10 Bolt/3.73s, 10 Bolt/3.73s
Re: how wide can i go?

Im pretty sure that will fit under your car. Im running 295/50/15s for street tires under the rear of mine with no modifications on stock rims. I plan on trying to stick something a little bigger under there once my engine build is done for drag tires, but I might need to do a little pounding to the inner fender wells to fit something like a 28" tall tire.
Reply
Old Feb 1, 2009 | 09:07 PM
  #3  
sab's Avatar
sab
Thread Starter
Junior Member
 
Joined: Jan 2009
Posts: 22
Likes: 0
From: alliance, ne
Car: 88 Firebird
Engine: 406 small block
Transmission: 700r4
Axle/Gears: stock posi
Re: how wide can i go?

thats the size i was thinking of using. specs say they have a sectional width of 12.5 inches i thought that might rub. is your car lowered at all? ill be dropping the rear about an inch shouldnt make a difference should it?
Reply
Old Feb 1, 2009 | 09:46 PM
  #4  
fast82z's Avatar
Senior Member
iTrader: (1)
 
Joined: Jul 2008
Posts: 751
Likes: 2
From: NE Ohio
Car: 82 Z28
Engine: TT LS
Transmission: 4L80E
Axle/Gears: S60 3.54's
Re: how wide can i go?

I know either the 275/50/15 or the 275/60/15 fit no problem, but I'm sure a 295 would work too. I used 325/50/15's at the end of last season that took just some hammering, but am looking at most likely using a set of 295/65/15 that shouldn't take much work if at all.
Reply
Old Feb 1, 2009 | 10:28 PM
  #5  
sab's Avatar
sab
Thread Starter
Junior Member
 
Joined: Jan 2009
Posts: 22
Likes: 0
From: alliance, ne
Car: 88 Firebird
Engine: 406 small block
Transmission: 700r4
Axle/Gears: stock posi
Re: how wide can i go?

also i was wondering if anyone knew of a inexpensive aftermarket wheel thats fairly light in weight. i want something to run at the track but wanna shave some weight to offset the extra pounds the bigger tires gonna add? i priced some cragar steel wheels only to find they were heavier than the stock 15s
Reply
Old Feb 2, 2009 | 06:44 PM
  #6  
Stippy17's Avatar
Member
iTrader: (6)
 
Joined: Jan 2008
Posts: 474
Likes: 1
From: Pittsburgh, PA
Car: 1986 Trans Am, 1985 Trans Am
Engine: 400 SBC, H.O. 305
Transmission: TH400, 700R4
Axle/Gears: 10 Bolt/3.73s, 10 Bolt/3.73s
Re: how wide can i go?

Originally Posted by sab
thats the size i was thinking of using. specs say they have a sectional width of 12.5 inches i thought that might rub. is your car lowered at all? ill be dropping the rear about an inch shouldnt make a difference should it?
I believe mine measure about 9 1/2 - 10 Inches wide when they are mounted, and I have no rubbing at all back there. My car isnt lowered at all, but with the 295/50/15s under there I think it looks good and doesnt need to be lowered at all.

Originally Posted by fast82z
I know either the 275/50/15 or the 275/60/15 fit no problem, but I'm sure a 295 would work too. I used 325/50/15's at the end of last season that took just some hammering, but am looking at most likely using a set of 295/65/15 that shouldn't take much work if at all.
How wide and tall are 325/50/15s? Wow well did they work out for you?
Reply
Old Feb 2, 2009 | 08:00 PM
  #7  
fast82z's Avatar
Senior Member
iTrader: (1)
 
Joined: Jul 2008
Posts: 751
Likes: 2
From: NE Ohio
Car: 82 Z28
Engine: TT LS
Transmission: 4L80E
Axle/Gears: S60 3.54's
Re: how wide can i go?

The 325/50/15's outer dimensions measure about 27.5" tall and 13" wide. I had to do some hammering, but they fit nicely with the 15"x10" 6.5" BS wheels. To do it completely right would take some cutting/welding, but since I don't turn hard with the drag tires on I don't care enough to put the work into that. I don't know how much the width helped considering it also hooked with a set of 275/60's, but they grabbed much harder than the 275/50's I was running for most of this past season. I have a few pics, just PM me if you want.
Reply
Old Feb 2, 2009 | 08:26 PM
  #8  
Stippy17's Avatar
Member
iTrader: (6)
 
Joined: Jan 2008
Posts: 474
Likes: 1
From: Pittsburgh, PA
Car: 1986 Trans Am, 1985 Trans Am
Engine: 400 SBC, H.O. 305
Transmission: TH400, 700R4
Axle/Gears: 10 Bolt/3.73s, 10 Bolt/3.73s
Re: how wide can i go?

Ill def. PM you, I like the sound of 325/50/15s under the car for dragging Hehe. I could keep my 295/50/15s for street use since there I have no rubbing issues with them and I might have some issues with the 325's. You might be pretty close to me too, Im from the Pittsburgh, PA area.


I work at National Tire & Battery, so being an employee I can order up to 4 tires a year for 10% under THEIR cost so Id like to buy the right ones the first time so I can buy two 37.5" + tires for my truck lol since they aren't cheap either.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
BrianChevy
Wheels and Tires
10
Aug 8, 2019 02:16 PM
Bubbajones_ya
Auto Detailing and Appearance
24
Oct 25, 2015 08:01 PM
PAFORM350
Wheels and Tires
2
Oct 2, 2015 07:21 PM
Vincent135
Transmissions and Drivetrain
9
Sep 28, 2015 10:50 PM
Abubaca
Car Audio
8
Sep 24, 2015 02:33 AM




All times are GMT -5. The time now is 11:14 AM.