bigger tires on 4whl z85 effecting speedometer and warranty? - Chevy Colorado & GMC Canyon
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 01-21-2005, 04:47 PM Thread Starter
Junior Member
Join Date: Dec 2004
Posts: 5
bigger tires on 4whl z85 effecting speedometer and warranty?

Got my colorado in June . Still want to know results of 31 inch tires on 4whl z85. I know the tires will most likely fit , but will it effect my
speedometer and my warranty. Who has put bigger tires on 4whl z85,
has your dealer discouraged the idea. Send so pics .... matty
brophymj is offline  
Sponsored Links
post #2 of 6 (permalink) Old 01-21-2005, 04:50 PM
Senior Member
Join Date: May 2004
Location: Wasilla, Alaska
Posts: 6,707
Carbuster is offline  
post #3 of 6 (permalink) Old 01-21-2005, 04:53 PM
Senior Member
Join Date: Dec 2004
Location: The Woods
Posts: 300
I got the sme set up your lookin at.

I did the math, and my speedometer reflects my math.... you go about 11% faster than your speedometer reads.

I cant comment on the warranty issue, I just plan on changing my tires if/when I bring it in for work.

Got pics in my gallery, check the link in my sig. Those are 31's.

CC Member #5

2005 Chevy Colorado Z85
Extended Cab, 4x4
5-Speed, JVC MP3 Player
Polk 6.5" Speakers
31" BFG All-Terrain T/A KO's on 15" Z71 Alum Wheels
Bubaloo's Ribbed Alum Underbody Skids
Rancho RS 5000 Rear Shocks

du510 is offline  
post #4 of 6 (permalink) Old 01-21-2005, 04:56 PM
Senior Member
Danny45's Avatar
Join Date: Oct 2004
Location: Broken Arrow, Oklahoma
Posts: 15,978
The dealership should be able to flash your PCM to accomodate the bigger tires since they do have a version of the truck w/ those tires on it.

Warranty is gonna be tricky. If you put tires that are of a size that did not come on the truck, then your warranty could be void concerning suspension components and the ABS system. This would be due to the weight difference between stock, and aftermarket tires/wheels. It wouldn't affect any other part of the vehicle unless GM could show that the bigger tires were responsible for the part failure.


10,000 Posts Club Member #1
Conservative Club Member #2
Gun Toting American Club Member #3
Danny45 is offline  
post #5 of 6 (permalink) Old 01-21-2005, 05:22 PM
Carbuster is offline  
post #6 of 6 (permalink) Old 01-21-2005, 06:23 PM
Senior Member
th2855's Avatar
Join Date: Feb 2004
Location: Honolulu, Hi
Posts: 4,429
Originally Posted by carbuster
Wow, I think you're the first person to think of this.
marty made a funny.

Z71 Crew cab / indigo blue / IL5 cyl
Gibson Stainless CAT back
K & N intake/PCM tuned
A R Atlas Wheels
wet okole seat covers
bed liner/rails/extender
carriage works billet grille & bow tie
goodmark air ram cowl hood
My Gallery
th2855 is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Chevy Colorado & GMC Canyon forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome