Jump to content

Adjust speedometer for non-stock tires


Recommended Posts

What options are there for correcting the speedometer when running non stock tire sizes? I understand the dealer can do that for you, but they will only change it to another optional stock tire size. I'm sure there are multiple ways to do this, what's the most reliable/least invasive?

Link to comment
Share on other sites

How does the hypertech work? Does it need to stay plugged in? I don't want to have something attached to the odb2 all the time.

is it easy enough to do that you could re calibrate often? unfortunately my winter and summer tires are not the same size.

Link to comment
Share on other sites

Not plugged in to the port, it’s plugged in to the harness under the dash, easily removed, program it on a pc before you plug it in, plug and play, easy.

Link to comment
Share on other sites

On 3/19/2021 at 12:19 PM, eppieguy said:

Dealer can't do it, or won't do it, I used Hypertech Speed Calibrator.

 

Exactly this, even if you are using an optional factory wheel and tire size.
 

Only way they will do a calibration is if you purchase a GM Parts and Accessories wheel package AND you use the specified tire size. 

Link to comment
Share on other sites

1 hour ago, Kickerz71 said:

Can I ask for feedback on the Hypertech programmer

I like it, no issues, easy to program, easy to remove if you’re afraid of warranty issues. 

Link to comment
Share on other sites

1 hour ago, kodiakdenali said:

This is the one that comes up when you use hypertech's search, is this what you have?

 

Speedometer Calibrators Inline - Part #730129

 

 

Yup, thats it, I got it on Amazon.

Link to comment
Share on other sites

You hook the black box up to a PC or laptop, it asks you Stock Tire Size, then new tire size, you then hit program, wait for it to do it's thing, then plug it inline with the harness of the truck. 10 minute process. 

Link to comment
Share on other sites

ah...simple yet disappointing. I wish it had just as simple UI on the box itself. I looked up their software, they distribute it only as a .exe, no ready to run binaries, no .deb package. Its unfortunate when things like that present an impediment to some potential customers using an otherwise useful product.

I wonder if the tire shop has the tools necessary to reprogram it? Honestly its really disappointing that cars don't have a factory integrated system for adjusting for tire size, or an automatic calibration process you can run that would calibrate the speedometer vs GPS data.

  • Like 1
Link to comment
Share on other sites

  • 4 weeks later...
  • 1 year later...
On 4/17/2021 at 12:17 PM, 316hepster said:

I have one from rough country for sale if you’re interested. It’s the inline type. Has worked well for me. Ended up w 2 of them. 

 

sorry to bump an old thread but do you still have that extra one?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.