Speedo Calibration on Oversized Wheels

Let me start by saying I never had my speedometer calibrated after the 37s and I have not had it done with my 40s lol.

I took a trip from Houston to Lake Charles over the weekend to get my head kicked in by the BlackJack dealers, but I was curious how fast I was going on the way back. On State Highway 73, the speed limit is 75mph from Winnie all the way into Port Arthur. I've noticed the truck seems to work much harder if I get the needle between the 70-75mph range. Even with that posted speed limit, I kept the truck around 65-67mph to keep the RPMs lower. **Full Disclosure: I am very much aware there is a difference in the speedo and how fast I'm actually goin, hence why I am going about this post.

I don't have a GPS, but my girl pulled up the WAZE app on her phone and we tried to check the speed based on their in app GPS. Not sure on the accuracy, but figured it'd give me an idea. Below is some speeds we gauged based on the speedo and what it translated to via the WAZE app:
60mph-->73MPH
65mph-->79MPH
70mph-->86MPH
75mph-->91MPH

I typically keep the truck at 60-62mph on the highway to work as it keeps the RPMs down below 1800rpms and I go with the flow of traffic. Even when I was stock, I never got the truck around 90-100mph.

What have you guys done to re-calibrate? I honestly don't think a recalibration is necessary at all and don't see a benefit to it other than actually being aware of your speed lol

 

The Hypertech Speedo caliber thing is the only device that will correct your speedometer and odometer.

 

This. It's a relatively easy install. Think I put it on my build thread if you end out going that route.

 

I didn't even think about the ODO. hmmm.. I guess it may be more beneficial than I thought. thanks!

 

sweet. ill check it out

 

Just to let you know I will be taking mine off when I get my gears installed.

 

does it do what its suppose to do? is it even necessary?

 

Glad to know about this, as I will want to recalibrate mine. Side note...who stole your money? Golden Nugget or L'Auberge? I live/work in the area. lol

 

Haha well I was actually up quite a bit at the Nugget, but I kept the Patron coming and I guess I gave it back lol I never really got ahead at L’auberge

 

Yes it does recalibrate your speedometer, you basically pick the tire size you want to use and load it. As I remember it was plug and play.

 

Was here yesterday
it's right across the street from the Hilton and it's called Resorts world in Manila, very lively Casino but didn't have time to play a little hold'em.

 

Nice. i like the guy picking his knwo eyeing the women(i'm assuming). but keep on coming to LA and giving us your Texas money...we need it as you can tell by the crap road and those bridges they're working on! lol

 

yeah, that bypass bridge that's down to 1 lane is a real PITA... was trying to win more truck parts, but cards weren't in my favor I guess lol

 

Rough Country makes one for the Tundra as well.
https://www.roughcountry.com/speedo...wPi3Iff2LKWZVdZyqt6__O7TZz63KsGwaAu1dEALw_wcB

 

Have you used or heard about it being used?