Results 1 to 11 of 11

Tire diameter difference

This is a discussion on Tire diameter difference within the Wheels and Tires forums, part of the General Help category; How much of a diameter difference can you have front to rear without tripping the ABS and/or TCS systems? The ...

  1. #1
    Super Moderator
    pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    21,576

    Black & Blue
    '02 WS.6 / '07 Suburban

    Tire diameter difference

    How much of a diameter difference can you have front to rear without tripping the ABS and/or TCS systems? The setup I am considering would have a 0.8" difference in diameter.

  2. #2
    Senior Member bills98ta's Avatar
    Join Date
    Feb 2007
    Location
    St Thomas, PA
    Posts
    5,047

    White
    1998 Trans Am

    I'd at least get a cheap hand held programmer to set up the new tire size. That could be enough to cause problems, but would be close.

  3. #3
    Super Moderator
    pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    21,576

    Black & Blue
    '02 WS.6 / '07 Suburban

    Quote Originally Posted by bills98ta View Post
    I'd at least get a cheap hand held programmer to set up the new tire size. That could be enough to cause problems, but would be close.
    I have HP Tuners Pro, so the tune will be updated for the track tires. Unless I mix tire brands I won't have matched diameter on the front though.

  4. #4
    Senior Member bills98ta's Avatar
    Join Date
    Feb 2007
    Location
    St Thomas, PA
    Posts
    5,047

    White
    1998 Trans Am

    If you would have an issue, then you'd figure out the difference from front to back... But, I think you'll be OK !!!
    I disabled my traction control, years ago... I don't even notice that yellow light on the dash anymore...

  5. #5
    Super Moderator
    pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    21,576

    Black & Blue
    '02 WS.6 / '07 Suburban

    I know the system has to compensate for turns and such where the wheels are going to rotate at different speeds. But I'm just not sure how much of a difference makes the system think something is awry. Guess there is only one way to find out...

  6. #6
    Member rkvette's Avatar
    Join Date
    Apr 2010
    Location
    northeastern pa.
    Posts
    175

    victory red
    2007 zo6

    i know for a fact newer gm cars/2008 and up this can affect stabilitrak-stability control.!!. already saved me from a crash in unknow road coditions at night -ice/snow, too fast for conditions !! fellow put 16 inch drag tires on old steel wheels on 2008 ss v8 impala fwd/ runs 13.5 at 103 mph .. noticed light comes on when going around turns on the street.. impala ss v8 is close to stock..rkvette

  7. #7
    Senior Member JoshuaGrooms83's Avatar
    Join Date
    Mar 2008
    Location
    Lake Geneva, WI
    Posts
    1,539

    Red
    98 Trans Am

    Im not sure if this is the same but when i went from stock TA rims (16"s) to 17" aftermarket rims, i went with 245/45s, which made my tire "taller" then originals, ( which i think made it look better anyway filling in the wheel wells). woth that said, no ABS or Traction control issuse. The only thing out of the norm is the fact that the SPEEDOmeter reads faster than what you are going. Maybe 2 or 3 mph. SO the SPEEDOMETER reads 90 but your doing 88. no biggy lol OTHER than that, a quick tune from a hand held and thats that. hope that helps.
    Last edited by JoshuaGrooms83; 08-29-2010 at 11:08 AM. Reason: SPEEDOMETER

  8. #8
    Member xmarkx's Avatar
    Join Date
    Mar 2010
    Location
    EAST bay area Cali
    Posts
    634

    black
    1999 camaro SS

    speedometer

  9. #9
    Moderator 35th-ANV-SS's Avatar
    Join Date
    Oct 2008
    Location
    Wherever life takes me
    Posts
    12,465

    Red
    02 35th LE Camaro SS

    Good question Jeff. The only thing I've seen on this was you have about a 5% variance allowance on most cars.

  10. #10
    Just me Y2KPewterSS's Avatar
    Join Date
    Nov 2006
    Location
    Broken Arrow, OK
    Age
    42
    Posts
    23,353

    Pewter metallic
    2000 Camaro SS

    I believe its anything over 1" difference. I am not positive on that though.

  11. #11
    Moderator 35th-ANV-SS's Avatar
    Join Date
    Oct 2008
    Location
    Wherever life takes me
    Posts
    12,465

    Red
    02 35th LE Camaro SS

    Jeff, the 5% is on the total circumference.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Question: Tire Diameter ? everyone plz chime in
    By Smokaholik in forum Wheels and Tires
    Replies: 2
    Last Post: 01-18-2010, 04:02 PM
  2. Tire diameter vs. speedometer question
    By Larry in forum Computer & Tuning
    Replies: 8
    Last Post: 01-08-2010, 08:03 PM
  3. Tire Diameter And Abs???
    By EXTNCT in forum Wheels and Tires
    Replies: 2
    Last Post: 08-15-2007, 08:04 PM
  4. How will tire diameter affect gear ratio???
    By 98ls1blackbird in forum Automatic Transmission
    Replies: 2
    Last Post: 04-06-2006, 07:30 PM
  5. header diameter?
    By delinquent543 in forum External Engine
    Replies: 5
    Last Post: 11-27-2005, 10:02 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •