Speedometer Calibration for those with bigger tires Here's the deal

[daytripper63]

Here's the deal for all of us with bigger tires and wheels, I just installed 22. 5" Alcoas with Yokohama 255-70R22. 5 ( tire height is approx. 36. 3" ) tires and needless to say my speedo was way off!

Went to the Dealer and it took about 10 minutes the tech plugged in to the port under the dash and set the tire revolutions per mile to the specs per Yokohama for my tires, Apparently our speedometer is set by tire revolutions per mile per tire mfg. specs. and my new tires spec. out 571 rev. per mile and the old tires were set at 674 revolutions per mile.

Now when I started asking questions the tech did say some years and models of our trucks are different as in the max tire diameter or rev. per mile that the computer will let you enter, he said the 03 can do about anything ( I guess I lucked out being an 03) He did say one possible side affect on some trucks when they reset speedo the ABS light stays on til about 20 mph. but I had no issues.

So for all you running 35" tires go to the tire mfg website and find out the rev. per mile and go to the dealer Oo.

P. S. Only cost me 30. 00 Alot less than a speeding ticket for guessing how far off speedo is and find out from police that I figured wrong :{

And I cant wait to see what my Hwy mileage is now...

 

[MMeier]

How much they rip you... uhh, I mean charge you for that service ?

 

[rbattelle]

I wish I had a DRB-III so I could do this myself when I go to larger tires. I have no choice but the dealer.



-Ryan

 

[daytripper63]

I just went back and edited

Dealer charged 30. 00 alot less than a speeding ticket for being off and guessing how far

 

[SRubenstein]

I wish I had a DRB-III so I could do this myself when I go to larger tires. I have no choice but the dealer.



-Ryan

Take a ride out to Mass. I own a repair shop and we purchased a DRB III a few of years ago. Just got my software updated 3 months ago. That's an open invitation to any TDR member in the New England area or any of you coming through Mass that needs a tire size calibration. This place has helped me a lot in making decisions w/ my truck and it just my way of paying it forward. We are not a diesel repair shop by trade but do some diesel service. Just PM me and I'll let you know when to come by.

 

[daytripper63]

Take a ride out to Mass. I own a repair shop and we purchased a DRB III a few of years ago. Just got my software updated 3 months ago. That's an open invitation to any TDR member in the New England area or any of you coming through Mass that needs a tire size calibration. This place has helped me a lot in making decisions w/ my truck and it just my way of paying it forward. We are not a diesel repair shop by trade but do some diesel service. Just PM me and I'll let you know when to come by.

Thats an awsome offer, I wish there were more people like yourself.

 

[Dieselnerd]

SRubenstein, you're the kind of TDR member that makes this site worthwhile.

 

[SRubenstein]

Being new to the diesel market, I don't have a lot to offer as far as knowledge w/performance problems w/ these things but I am pretty good when it comes to electronic problems and working w/scan tools. I'm just glad to be a part of this place. It's nice to receive intelligent responses from people when you have a question. Other sites will flame ya and make you feel like an idiot. This place has been great since day 1 for me before I even owned my CTD.

 

[evldsl]

Being new to the diesel market, I don't have a lot to offer as far as knowledge w/performance problems w/ these things but I am pretty good when it comes to electronic problems and working w/scan tools. I'm just glad to be a part of this place. It's nice to receive intelligent responses from people when you have a question. Other sites will flame ya and make you feel like an idiot. This place has been great since day 1 for me before I even owned my CTD.

Oo. I will second that!

 

[JCBerry]

Take a ride out to Mass. I own a repair shop and we purchased a DRB III a few of years ago. Just got my software updated 3 months ago. That's an open invitation to any TDR member in the New England area or any of you coming through Mass that needs a tire size calibration. This place has helped me a lot in making decisions w/ my truck and it just my way of paying it forward. We are not a diesel repair shop by trade but do some diesel service. Just PM me and I'll let you know when to come by.

Awsome offer as soon as I get the new tires I'll look you up. Thanks

 

[BILLUA]

Ok Dude, how about the pictures???



There is Nothing cooler than a dually with 22. 5's

 

[CLAYTON]

Ok Dude, how about the pictures???



There is Nothing cooler than a dually with 22. 5's

I second that motion... let's see some pics