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04dakota
Dodge Dakota
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6/25/2007
18:49:28
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 Subject: 04dakota
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Message:
I have a 2004 SXT 4x2. Tire size is 255/65R 16. I'm looking at new tires and the only size available at my Pep Boys currently is a 265/70R. They've assured me that they'll fit, however is this too big for my truck. Will it considerably affect gas mileage or my speedometer/odometer? Will my truck sit up higher than it does now? Any help would be greatly appreciated.
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modain
GenIII
6/25/2007
21:06:14
|  RE: 04dakota
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Message:
It will affect your odometer. The stock wheel size calibration on my 2002 is 27.75", and I suspect yours is that way too. This is what the loaded measurement of the base 235/75/15 tire comes to. The 255/65/16s measure 28" on the truck. That 1/4" is not enough to throw off the odometer/speedometer enought to worry about. But, the 265/70/16s that Manny, Moe, & Jack want to push on you will make a huge difference.
That tire will measure about 30" installed. That means the speedo/odo will be way off. To get the correct numbers multiply your speed and distance by 1.081 to get the corrected values. So if you calc the MPG strictly by the odometer it will not have traveled as far as you really did. And when your speedo says you are going 65 you are really going 70 - but officer, I thought I was only going 65... Therefore those numbers will show very bad.
After the correction don't be surprised to see that your MPG has dropped, as the tires weigh more and are larger in circumference: the engine will have to work harder just to roll them.
My $.02: buy your tires somewhere else where you can buy the size *you* want. Stick with 255/65/16s. Anything larger you will sap you acceleration and power.
I have 255/70/16s on my QC and Durango. They look so much better in the wheel well that the 255/65/16s that came with them. But then I have a V8 so the power hit isn't as profound as you will find on your V6. Any yes, it raised my trucks about 1/2 with just the tire change.
What's your left foot doing?
==============
2002 Graphite QC SLT Plus, 4.7L, NV3500, Superchips 3715, 3.92 LSD, R/T rear swaybar, no chrome, loads o'fun...
2001 Patriot Blue Durango SLT, 4.7L, 45RFE, Superchips 3715, 3.55 Open (for now)
1999 Forest Green Dakota RC Sport, 2.5L, NV1500, 3.55 Open
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J and J Auto
GenII
6/26/2007
00:29:03
|  RE: 04dakota
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Message:
Walmart has the uniroyal lberator tires at a
great price and they work excellent in mud and
snow free rotation every 6000 miles and road
hasard free flat repair or replacement
You have some options with the speedo
98 and up the superchips tunner will recalibrate
speedo
There are also calibration units availible
Or the old stand by the dealer can change the
computer also they charge $75
Larry
J&J Auto
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04dakota
Dodge Dakota
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6/26/2007
06:52:45
| RE: 04dakota
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Thanks for all of your help. It's very much appreciated.
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toyo proxies
Dodge Dakota
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6/26/2007
20:10:53
| RE: 04dakota
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Message:
i use toyo proxies v rated A TRACTION A TEMP 440 WEAR CHECK THEM OUT
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bugbyte
Dodge Dakota
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8/07/2007
03:34:55
| RE: 04dakota
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Message:
You definitely want to stay with your original tire size. I have the same model Dakota as you, and when I bought it used, it had 265/70/16s on it. Speedo was off by about 3 to 4 MPH at 65. I swapped out the tires 255/65/16s and noticed slightly improved acceleration over the larger tires. With the 3.7L I would not recommend larger tires without changing the axle gears. By the way, I have the Toyo Open Country AT tires and have been very happy with them. 1010tires.com is a good place to shop for tires just to see what is out there. They also have a tire size calculator that helps you compare different tire sizes.
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johnny
Dodge Dakota
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8/20/2007
03:38:58
| RE: 04dakota
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you can go to discount tire .com and they have a conversion that will tell you how slow or fast you are going by your old VS new tire size... I used the tool for 20's and it worked great.
Johnny
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