Wheels and Tires Need help with wheels or tires? Got fitment issues? Have questions about tire performance and handling? Ask all of those questions here!

20” wheel fitment

Thread Tools
 
Search this Thread
 
Old Nov 11, 2020 | 01:12 PM
  #1  
Terence Zelman's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2019
Posts: 15
Likes: 0
From: Sherwood Park, Alberta, Canada
Car: 1987 Iroc Z
Engine: 5.7
Transmission: 4 speed auto
20” wheel fitment

Hey folks, been digging around but not having much luck. Does anyone know if the wheels listed below will fit an 87 iroc? I can do some modifying to make it work.

Front- 20” x 10” +20mm offset or 5.78” back space
Rear- 20” x 11” +43 offset or 6.69” back space

thanks in advance
Reply
Old Nov 11, 2020 | 02:29 PM
  #2  
T.L.'s Avatar
Supreme Member
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 1999
Posts: 3,047
Likes: 826
From: Colorado USA
Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 ..
Re: 20” wheel fitment

20s are too big for a thirdgen. The tires will have no sidewall and will look and ride like crap...
Reply
Old Nov 12, 2020 | 08:04 AM
  #3  
ShiftyCapone's Avatar
Supporter/Moderator
25 Year Member
iTrader: (7)
 
Joined: Feb 2001
Posts: 13,777
Likes: 567
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: 20” wheel fitment

They will indeed ride hard as rocks. Those wheels are pretty wide too and will likely stick out past the fender. I will all but guarantee it.
Reply
Old Nov 12, 2020 | 09:24 AM
  #4  
T.L.'s Avatar
Supreme Member
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 1999
Posts: 3,047
Likes: 826
From: Colorado USA
Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 ..
Re: 20” wheel fitment

People seem to overlook the fact that modern cars with 20s have big wheel arches to accommodate them. There is stlll an appreciable amount of tire sidewall. I think 17s are about the limit for what's practical on a thirdgen...
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
joshfgilmer
Wheels and Tires
2
Aug 6, 2012 10:53 PM
cookie21
Wheels and Tires
7
Feb 6, 2012 07:10 PM
astoria18
Body
3
Sep 22, 2005 12:19 AM
sbchevyz28
Suspension and Chassis
4
Apr 20, 2004 08:27 PM
94-6spd
Tech / General Engine
4
Jul 20, 2003 12:55 PM




All times are GMT -5. The time now is 01:32 PM.