Are these tires a stretch??
01-03-2011, 07:20 PM
#1
Junior Member
Thread Starter
iTrader: (2)
Join Date: Jun 2010
Location: Arlington TX
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 IROC-z
Engine: 305 TPI
Transmission: 700R4
Are these tires a stretch??
After doing my homework, Including a thorough search of this forum, i have chosen a wheel and tire package.
Front - 17x8 wheels, 4.5 inch backspace with 245/45 17 tires
Rear - 17 x 10 wheels, 6 inch backkspace with 275/40 17 tires.
Question - some things I read say that the 275/40 17 tires are not quite large enough for the 10 inch wheels, anybody have any hands on experience with this combo before I pull the trigger on tire purchase?
Much Appreciated
Front - 17x8 wheels, 4.5 inch backspace with 245/45 17 tires
Rear - 17 x 10 wheels, 6 inch backkspace with 275/40 17 tires.
Question - some things I read say that the 275/40 17 tires are not quite large enough for the 10 inch wheels, anybody have any hands on experience with this combo before I pull the trigger on tire purchase?
Much Appreciated
01-03-2011, 07:27 PM
#2
Banned
iTrader: (12)
Join Date: Jul 1999
Location: Bertram (outside Austin), TX
Posts: 12,212
Likes: 0
Received 10 Likes
on
10 Posts
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: Are these tires a stretch??
Where did you read that? 
The typical recommended range is a 9"-11" wheel.
Why only a 8" w/245 up front?
The typical recommended range is a 9"-11" wheel.Why only a 8" w/245 up front?
01-03-2011, 08:46 PM
#3
Supreme Member
iTrader: (10)
Join Date: Oct 2007
Location: Fl.
Posts: 1,881
Likes: 0
Received 2 Likes
on
2 Posts
Car: 83 Trans Am / 96 Jeep XJ
Engine: 355 / 4.0 I6
Transmission: TH350 / Auto
Axle/Gears: 3.23 10-bolt / 4wd
Re: Are these tires a stretch??
I am running 17x8 with 245/45/17 on front and 17x9 with 275/40/17 on the rear, so it is a good combo. Only thing is my front tires rub at about 3/4 of full lock, which is really annoying.
01-03-2011, 09:18 PM
#4
Junior Member
Thread Starter
iTrader: (2)
Join Date: Jun 2010
Location: Arlington TX
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 IROC-z
Engine: 305 TPI
Transmission: 700R4
Re: Are these tires a stretch??
Stephen....I came across a set of Boyd Coddingtons at a price that was too ridiculous to pass up. They included the 8's and the 10's. The tire sizes were the best I could figure for original height and they are also within a couple hundredths of each other when mounted. Any other suggestions would be welcome as far as tire sizes, but the wheels are a done deal already.....Thanks for your reply. As far as where I read that, I did a Google search and that info turned up in a Musatng forum......go figure
Last edited by coneheadjimmy; 01-03-2011 at 09:28 PM. Reason: Finish answering Stephen
01-03-2011, 09:22 PM
#5
Junior Member
Thread Starter
iTrader: (2)
Join Date: Jun 2010
Location: Arlington TX
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 IROC-z
Engine: 305 TPI
Transmission: 700R4
Re: Are these tires a stretch??
Are you lowered any, or stock height? I have not messed with the suspension yet, probably won't due to where I live and the roads here. 62K miles and been through 3 airdams already.
01-03-2011, 10:09 PM
#6
Supreme Member
iTrader: (1)
Join Date: Jul 2006
Location: Aloha, Oregon
Posts: 1,132
Likes: 0
Received 11 Likes
on
6 Posts
Car: '91 Camaro Z28, '85 Camaro Z28
Engine: LB9, LB9
Transmission: T5, 700r4
Axle/Gears: Eaton 3.73 Posi, 3.23 Posi
Re: Are these tires a stretch??
A 275 on a 10" wheel isn't a stretch by any means but a 275 is usually run on a 9" wide wheel. I think a 285 would probably be squared off a little better.
01-04-2011, 02:20 PM
#7
Supreme Member
iTrader: (10)
Join Date: Oct 2007
Location: Fl.
Posts: 1,881
Likes: 0
Received 2 Likes
on
2 Posts
Car: 83 Trans Am / 96 Jeep XJ
Engine: 355 / 4.0 I6
Transmission: TH350 / Auto
Axle/Gears: 3.23 10-bolt / 4wd
Re: Are these tires a stretch??
My car is stock height with those wheels. Honestly the rubbing on the front is getting unbearable. Whats the backspacing on the wheels you got?
Trending Topics
01-04-2011, 08:41 PM
#8
Junior Member
Thread Starter
iTrader: (2)
Join Date: Jun 2010
Location: Arlington TX
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 IROC-z
Engine: 305 TPI
Transmission: 700R4
Re: Are these tires a stretch??
Backspacing on the 8 inchers for the front is 4.5 inches,same as the original IROC wheels. The wheel/tire combo height is also within a couple hundredths of what I have now, never rubbed at all. Do you have any idea what exactly they are rubbing on? I am curious now.
01-04-2011, 09:31 PM
#9
Member
Join Date: Jan 2002
Location: 32548
Posts: 116
Likes: 0
Received 1 Like
on
1 Post
Car: 1991 Z28
Engine: 350 TPI
Transmission: 700-R4
Axle/Gears: 10 bolt Disc/Posi
Re: Are these tires a stretch??
Nevermind, little too tired...lol
Last edited by 5.SLOW; 01-04-2011 at 09:42 PM.
01-04-2011, 09:35 PM
#10
Supreme Member
iTrader: (10)
Join Date: Oct 2007
Location: Fl.
Posts: 1,881
Likes: 0
Received 2 Likes
on
2 Posts
Car: 83 Trans Am / 96 Jeep XJ
Engine: 355 / 4.0 I6
Transmission: TH350 / Auto
Axle/Gears: 3.23 10-bolt / 4wd
Re: Are these tires a stretch??
Backspacing on the 8 inchers for the front is 4.5 inches,same as the original IROC wheels. The wheel/tire combo height is also within a couple hundredths of what I have now, never rubbed at all. Do you have any idea what exactly they are rubbing on? I am curious now.
https://www.thirdgen.org/forums/whee...ld-really.html
01-05-2011, 09:21 AM
#11
Junior Member
Thread Starter
iTrader: (2)
Join Date: Jun 2010
Location: Arlington TX
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 IROC-z
Engine: 305 TPI
Transmission: 700R4
Re: Are these tires a stretch??
By the way, thanks to everybody for the good info.
Last edited by coneheadjimmy; 01-05-2011 at 04:06 PM.
Thread
Thread Starter
Forum
Replies
Last Post
LiquidBlue
Wheels and Tires
32
12-10-2019 04:06 PM
