285/65-18
Junior Member
Joined: Sep 2011
Posts: 12
Likes: 0
Originally Posted by Jack Bauer
But changing the size of the rims doesn't change the size of the tires. I also plan to purchase a programmer so that I can...."play". What bothers me is that a at church this past Sunday, a Sport Trac had tires that were the same size as mine. I only want to bump them up to around 32 or 33. I prefer smaller rims. But I would consider 18", but not 20". I don't like my wheels looking like all metal with a low profile look. I'm not racing.
. All vehicles have different ratios for tires. I may not have the numbers exact that I am going to give you but here is an example. You say your tires are 245/70r17. So we will say they are 30.0 in tall(overall) diameter. You will have to get the same overall diameter in an 18 or a 20 in tire. You will find way more options in the 18 in. Go to a wreckers and get 4 rims that's your first start. The 18 in rim combo should be close to the 285/65r18. It will be closest match that will not create a problem and you will have way more options in tire choices. For example a BFF all terrain or a Toyota open country or even a nitro line brand. I put 20's on mine and snuck on a 33x12.50x20 Toyota open country mt... Love em. I work at a ford dealer and I was able to program my overall diameter in. Not the tire size now readings are right and I have no shifting issues and mileage is correct. I sell tires at my place and I swear there is slot the dealer can do for ya as long as you approach them by asking if they can do it not by telling them they can do it. Hope that works
Senior Member
Joined: Jul 2011
Posts: 479
Likes: 2
I understand
. All vehicles have different ratios for tires. I may not have the numbers exact that I am going to give you but here is an example. You say your tires are 245/70r17. So we will say they are 30.0 in tall(overall) diameter. You will have to get the same overall diameter in an 18 or a 20 in tire. You will find way more options in the 18 in. Go to a wreckers and get 4 rims that's your first start. The 18 in rim combo should be close to the 285/65r18. It will be closest match that will not create a problem and you will have way more options in tire choices. For example a BFF all terrain or a Toyota open country or even a nitro line brand. I put 20's on mine and snuck on a 33x12.50x20 Toyota open country mt... Love em. I work at a ford dealer and I was able to program my overall diameter in. Not the tire size now readings are right and I have no shifting issues and mileage is correct. I sell tires at my place and I swear there is slot the dealer can do for ya as long as you approach them by asking if they can do it not by telling them they can do it. Hope that works
. All vehicles have different ratios for tires. I may not have the numbers exact that I am going to give you but here is an example. You say your tires are 245/70r17. So we will say they are 30.0 in tall(overall) diameter. You will have to get the same overall diameter in an 18 or a 20 in tire. You will find way more options in the 18 in. Go to a wreckers and get 4 rims that's your first start. The 18 in rim combo should be close to the 285/65r18. It will be closest match that will not create a problem and you will have way more options in tire choices. For example a BFF all terrain or a Toyota open country or even a nitro line brand. I put 20's on mine and snuck on a 33x12.50x20 Toyota open country mt... Love em. I work at a ford dealer and I was able to program my overall diameter in. Not the tire size now readings are right and I have no shifting issues and mileage is correct. I sell tires at my place and I swear there is slot the dealer can do for ya as long as you approach them by asking if they can do it not by telling them they can do it. Hope that works
But are you saying that reprogramming will do away with the awkward shifting once I reprogram it?
Senior Member
Joined: Jul 2011
Posts: 479
Likes: 2
This is posted as an optional factory tire size
Exterior Options
Original tire 255/65/17
Sidewall: 6.53 in
Radius: 15.03 in
Diameter: 30.05 in
Circumf: 94.41 in
Revs/mile: 671.13
Factory Optional Tire 275/55/20
Sidewall: 5.95 in
Radius: 15.95 in
Diameter: 31.91 in
Circumf: 100.25 in
Revs/mile: 632.04
My proposed Tire 275/70/17
Sidewall: 7.58 in
Radius: 16.08 in
Diameter: 32.16 in
Circumf: 101.03 in
Revs/mile: 627.17
Exterior Options
- P275/55R20 OWL All-Season Tires
- Tinted Clearcoat Paint Red Candy
- 20" Chrome Clad Aluminum Wheels
- 18" Chrome Clad Aluminum Wheels
Original tire 255/65/17
Sidewall: 6.53 in
Radius: 15.03 in
Diameter: 30.05 in
Circumf: 94.41 in
Revs/mile: 671.13
Factory Optional Tire 275/55/20
Sidewall: 5.95 in
Radius: 15.95 in
Diameter: 31.91 in
Circumf: 100.25 in
Revs/mile: 632.04
My proposed Tire 275/70/17
Sidewall: 7.58 in
Radius: 16.08 in
Diameter: 32.16 in
Circumf: 101.03 in
Revs/mile: 627.17
Senior Member
Joined: Sep 2011
Posts: 25,045
Likes: 37
From: Maryland
Originally Posted by grkmec
Nice. Do you have any hi res pics of your rim / tire combo?
This one is a little better but it's getting dark outside. I could get a better one tomorrow if you want.
2011 4x4 XLT SCREW Eco
Joined: Oct 2011
Posts: 77
Likes: 0
From: Dallas
5 Year Member
Joined: Aug 2011
Posts: 2,297
Likes: 325
From: Mississippi
Those look really good. Like the color of that truck too. And that is an enourmous garage, which I had a garage that would fit my truck in.
Last edited by bcb97; Oct 18, 2011 at 07:49 AM.