2006 Dodge Ram Upsizing tires

Tiny
GABBYTONY
  • MEMBER
  • 2006 DODGE RAM
  • V8
  • 4WD
  • AUTOMATIC
  • 60,000 MILES
My truck came with 270.7017.
I want to put 285.70.17 tires on them. Is there any problem with this (I have the clearance) and will it affect my speedometer and odometers?

Thank you
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Saturday, August 21st, 2010 AT 4:22 PM

10 Replies

Tiny
WRENCHTECH
  • EXPERT
Yes, there is a problem with doing that. Not only will it effect the speedometer but the transmission relies on that info for shifting decisions and the ABS sensors will be reading wrong also. If you change tire or rim size, you should always try to maintain the same height to avoid these issues.
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Saturday, August 21st, 2010 AT 4:39 PM
Tiny
GABBYTONY
  • MEMBER
Can adjustments be made by my Dodge dealer to correct these changes?
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Saturday, August 21st, 2010 AT 4:41 PM
Tiny
WRENCHTECH
  • EXPERT
For the speedometer yes, but not the ABS.
The other issue here is that it will change the gear ratio substantially which will have a big effect on the fuel mileage and power.
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Saturday, August 21st, 2010 AT 4:42 PM
Tiny
GABBYTONY
  • MEMBER
WOW.

I wonder why the Service Manager told me there would be no problem. I discussed it with him before I made the change to bigger tires.
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Saturday, August 21st, 2010 AT 4:50 PM
Tiny
WRENCHTECH
  • EXPERT
The Service Manager or the Service Writer?
The service writer is not a tech. He's a service salesman.

Don't get me wrong, the problem is not critical but I assure you that if you have a transmission or suspension failure under warranty, they will be using it for an excuse to not cover you. I realize your truck is a 96 and that's why the guy was so quick to say "no problem". If it was still under warranty, he would have had a different answer.

There will be a power and mileage and shifting difference.
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Saturday, August 21st, 2010 AT 4:57 PM
Tiny
GABBYTONY
  • MEMBER
It IS still under warranty. I have a Chrysler unlimited mileage/years warranty. Yeah that's right. Issued by Chrysler. I have the contract and my dealer has a copy of the contract. My service MANAGER told me there would be no problem and he knows that I have the extended warranty. Now you have me concerned.
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Saturday, August 21st, 2010 AT 5:08 PM
Tiny
WRENCHTECH
  • EXPERT
I misread the year of it. The general rule of thumb on ABS is that you can live with up to 10%change. Your just a little above that. I would be real concerned about your warranty though. They DO have the right to deny any warranty claim to do with transmission, differential or suspension unless that tire size is listed as optional for that vehicle in the owners manual. You'll probably never have an issue but it CAN happen. I don't see the reason or benefit to do something like that anyway.
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Saturday, August 21st, 2010 AT 5:16 PM
Tiny
GABBYTONY
  • MEMBER
I did it for looks. There was too much space in the well well. LOL Again, I only went form 270.70.17 to 285.70.17.

As far as mileage, it is a Ram 2500 Big Horn with a Hemi 5.7 so mileage isn't something I worry about LOL
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Saturday, August 21st, 2010 AT 5:26 PM
Tiny
WRENCHTECH
  • EXPERT
That's right, it's not a giant amount but it's all height. By the sounds of it you have already done it so I wouldn't worry about it now. With the Hemi, you never notice the power difference.
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Saturday, August 21st, 2010 AT 5:30 PM
Tiny
GABBYTONY
  • MEMBER
Thanks for the input. I have a good relationship with my dealer so I think he will cover me if there is a problem.

Thank you very much.
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Saturday, August 21st, 2010 AT 5:31 PM

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