Changing Rims
Posting Guru
Joined: Jul 2005
Posts: 1,940
Likes: 0
Generally, I find the profile rating is lower on the 17's than comparable 16" rims. If in doubt, use this calculator to compare the two....
Tire size calculator
Tire size calculator
Mountain Pass
Joined: Jan 2002
Posts: 213
Likes: 0
From: Aston Pa USA
My truck originally had 16" and the previously changed to 17".
Original stock tire size was 255/70/16, tires are now 265/70/17 also a stock size.
My speedo is off by about +5mph at 65 (speedo reads 65 and my GPS says 70).
On an 02, I think that the speedo can be corrected in the ECM by the dealer (if your new tire sized is within a certain range) or with a tuner.
On my 97 I have to change the VSS drive gear.
I'm just waiting for nice weather and free time.....
Original stock tire size was 255/70/16, tires are now 265/70/17 also a stock size.
My speedo is off by about +5mph at 65 (speedo reads 65 and my GPS says 70).
On an 02, I think that the speedo can be corrected in the ECM by the dealer (if your new tire sized is within a certain range) or with a tuner.
On my 97 I have to change the VSS drive gear.
I'm just waiting for nice weather and free time.....
Elder User
Joined: Jan 2008
Posts: 589
Likes: 0
From: Stockton Ca.
Rim size doesn't matter, tire size does. When you decide what size tire you're going to use just "Google" tire calculator.
Postmaster
Joined: Aug 2003
Posts: 2,977
Likes: 1
From: South Texas
why 17's? Are you getting a good deal on them, or are they a style you really like and they only come in 17's? It's not a very popular size, and tires may be limited in sizes and/or pricey. Just something to think about.
Thread Starter
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Senior User
Joined: Jun 2005
Posts: 148
Likes: 0
From: Shelter Island, NY
17" Rimes
Thread Starter
|
Senior User
Joined: Jun 2005
Posts: 148
Likes: 0
From: Shelter Island, NY
My truck originally had 16" and the previously changed to 17".
Original stock tire size was 255/70/16, tires are now 265/70/17 also a stock size.
My speedo is off by about +5mph at 65 (speedo reads 65 and my GPS says 70).
On an 02, I think that the speedo can be corrected in the ECM by the dealer (if your new tire sized is within a certain range) or with a tuner.
On my 97 I have to change the VSS drive gear.
I'm just waiting for nice weather and free time.....
Original stock tire size was 255/70/16, tires are now 265/70/17 also a stock size.
My speedo is off by about +5mph at 65 (speedo reads 65 and my GPS says 70).
On an 02, I think that the speedo can be corrected in the ECM by the dealer (if your new tire sized is within a certain range) or with a tuner.
On my 97 I have to change the VSS drive gear.
I'm just waiting for nice weather and free time.....
what gear did you wind up with in the VSS drive gear on the 97? I started with 245/70/16 and changed to 265/70/17
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Mountain Pass
Joined: Jan 2002
Posts: 213
Likes: 0
From: Aston Pa USA
I was waiting for nicer weather to crawl under the truck and check what I have now, since nobody has been able to tell me which gear I will need.
I can't believe that none of the several dealers that I have been to can look up that gear and give me a part number!
I have 3.55 gear, and a factory option tire size, but every dealer I went to told me I have to pull the VSS out and count the teeth on the one I have.....
Unless you have the same rear ratio as I have, you will need a different gear I'd think.
When I get it squared away, I'll post it.
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