Went up a size from 275/55/20 to 275/60/20. Should I recalibrate?

[Condor757]

Just wondering what the consensus is. Most opinions I’ve gotten is that it’s such a minimal difference in speed that it doesn’t justify the cost. I can live with 2-3mph difference. What do you guys who have gone up a tire size think?

 

[Bearman95]

It was 2.5 mph difference at 70 mph when I switched tires. Same size as you listed. I corrected with a taser dt . The shift points were off also until I corrected the speedometer.I have 2020 Laramie.

 

[Smashius]

I would.

 

[Condor757]

Thx guys. Can I purchase and operate the Tazer DT with an iphone? I know that I can’t with alfa OBD.

 

[Buz]

Can you post a few pics with those tires?

 

[Yamie700]

I put 275/60/20 BFG K02s on mine. Stock was 285/45/22. When the speedo says 70mph my old garmin GPS showed 72. I didn't bother with recalibrating. Typically with stock tire sizes your speedo is always a little higher than actual speed, most car brands do that.

 

[Condor757]

Can you post a few pics with those tires?

 

[Finn5033]

I switched to the same size as you and o haven’t recalibrated mine. I really want to but can’t get myself to pull the trigger on buying something to do it with

 

[Condor757]

So I looked into getting the Tazer DT and the cheapest I found is $329. My dealership is going to do it for $150 tomorrow... that’s what I’m gonna do since a lot of the Tazer reviews show that many folks have had issues after plugging it in. I also honestly don’t want or need any of the other Tazer functions, just want the speedo recalibrated mainly for the shift points and MPG read outs.

 

[Buz]

Bonuses by going to this tire size:
-Wider
-More Sidewall
-Bonus 1/2" lift off the ground
-Lower RPM's on highway
-Just makes the truck look more like a truck
-No lift/level required.

Cons
-Recalibrate Speedo ($$$)
-Hit on MPG especially around town
-Slightly harsher ride, especially if you don't air them down a little from stock psi

 

[Condor757]

Got the recal done today, dealer did it for $135. I just want to reemphasize how important it is to build a good relationship with your service techs.. they did me right (usual dealer price is $185.)
Glad to have a properly reading speedo and shift points... All is right with the world again, lol.

 

[jmcdtucson]

I just did this same thing and honestly can't tell the difference.
I was used to having the speedo off a couple mph at 70 in my Jeep anyway. And what does it matter if it shifts at 1 or 2 mph different spot?
For what it's worth, it's a diesel with the 3.92 gearing. Might pay the dealer at some point just for my OCD.

 

[Condor757]

@jmcdtucson ... it’s mostly all about the OCD brother good luck!

 

[theblet]

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Looks great ! Do you have a living kit?

 

[Condor757]

Looks great ! Do you have a living kit?

Thx bud. No lift or level and not planning on doing it, I’m happy with the stance with the larger tires.

 

[theblet]

Thanks

 

[theblet]

I thought about going wider, instead of taller not to make fuel mileage worse. Not sure what size tho.

 

[HemiDude]

Bonuses by going to this tire size:
-Wider
-More Sidewall
-Bonus 1/2" lift off the ground
-Lower RPM's on highway
-Just makes the truck look more like a truck
-No lift/level required.

Cons
-Recalibrate Speedo ($$$)
-Hit on MPG especially around town
-Slightly harsher ride, especially if you don't air them down a little from stock psi

I believe if the OP went from a 275/55/20 to a 275/60/20, that it would still be the same width. The first number in a tire size indicates width, in this case 275 mm

 

[Condor757]

I believe if the OP went from a 275/55/20 to a 275/60/20, that it would still be the same width. The first number in a tire size indicates width, in this case 275 mm

Correct, same width (275) just 1/2in taller (55 to 60)

 

[Buz]

I believe if the OP went from a 275/55/20 to a 275/60/20, that it would still be the same width. The first number in a tire size indicates width, in this case 275 mm

Not sure this is true. It's a RATIO of width to height on the tire. The 275/60 actually has almost a 1" wider tread than a 275/55.
Go online to tirerack and compare. You'll see.
**EDIT**
Acutually there seems to be no rhyme or reason with actual tread width and the 275 designation. Some are wider than others.