Truck tire question re replacing

[beowulf]

deleted:

Thanks for responding guys. Very sorry for the delete, but I was not sure of the info I provided - I started to doubt my info after I posted - and as the truck was in the woods in the dark, I wanted to go back and check this morning.

I did not want to waste anyone's time possibly providing information that was based on incorrect info, so deleted it last night and planned to check info this morning and repost. It seems however, you guys are too quick for me and were already providing info. I went out this morning and verified the size, changed the tire, and plan to get four new tires. While I thought the treads were pretty good on the working four, when I looked at the treads on the spare they were so much better that I decided I should get four new ones.

Anyway, the existing tires are 235-75-17s. I found some in this size late last night on Internet - though not a lot of brand choices and only a very few choices overall -spent an hour poking around last night. I found 235-70-17 at Costco and a much better deal re cost and a brand I like.

So my question, I know that if I was going to replace only one tire I need the size to be the same, but now that I will be replacing four tires, can I go with a 235-70-17 with the existing wheels? (tho the spare would be 235-75-17 - I guess that would be okay in a pinch). I have not checked re tires at Costco or elsewhere re the recommended 352-80-17s as ning advises. I will be checking more sellers this morning, tho I think I have pretty exhausted the search re area tire dealers - some require you to call them tho, and could not do that late last night - I will start my calling now.

So, I will be getting four new tires today and prefer the more common size of 235-70-17s - doable? Suggestions?
Again, sorry for the delete.

 

[ning]

What tire size numbers mean:
235/75 R 17
235 = width of tire tread, in mm.
75 = aspect ratio - the "height" of the tire (from the wheel to the outside of the tire), divided by the width.
R = radial
17 = size of the rim, in inches.

A lower aspect ratio (70) with the other values the same will be a smaller diameter tire (not by a lot, but some). Definitely don't mix different size tires.

Smaller tires will effectively increase your axle ratio (engine turning moves truck less), and lower the truck.
Larger tires effectively decrease your axle ratio (engine turning moves truck more), and raise the truck.
Either change will make your speedometer & odometer inaccurate, though this can be adjusted (used to be by changing a little gear; these days probably by changing something in the computer).

Depending on your setup, larger tires may improve your mileage; smaller tires will probably not.
I'd check out 235/80r17 if I were you.

 

[newbury]

deleted

What?

What tire size numbers mean:
235/75 R 17
235 = width of tire tread, in mm.
75 = aspect ratio - the "height" of the tire (from the wheel to the outside of the tire), divided by the width.
R = radial
17 = size of the rim, in inches.

A lower aspect ratio (70) with the other values the same will be a smaller diameter tire (not by a lot, but some). Definitely don't mix different size tires.

Smaller tires will effectively increase your axle ratio (engine turning moves truck less), and lower the truck.
Larger tires effectively decrease your axle ratio (engine turning moves truck more), and raise the truck.
Either change will make your speedometer & odometer inaccurate, though this can be adjusted (used to be by changing a little gear; these days probably by changing something in the computer).

Depending on your setup, larger tires may improve your mileage; smaller tires will probably not.
I'd check out 235/80r17 if I were you.

A couple of notes on this -
I've read several places that putting bigger tires on leads to premature front end part failure.
Larger tires without correcting the odometer decreases the mileage. Thus with a 10% difference if your warranty is based on mileage it will last 10% longer

 

[topbuilder]

"Nothing is permanent."

Even a question it seems.

 

[beowulf]

Update: I am finding a few tires - and being told that my 235-75-17 is a bit of an "odd ball" size and can be found but would have to be ordered. I have been told a 235-70-17 would be a good choice (more common and easier to find in the future) given my usage, miles per year, etc. and would fit the wheels I have and would lower the truck very slightly, and speedometer would change but not likely typically noticeable.

Looking at Consumer Reports, and reviews, so will try to find the 235-70-17 tires in the area (while continuing to ask about the 235-75-17s), in the tires I want, and at best price.

 

[LD1]

Why are you stuck on 235s?

What is limiting you from going a little wider? 245's 255's 265's etc.

Lot of tire choices. You could probably find 5-6 metric sizes that are all within an inch or two of what you have in both width and height. And I have yet to see a truck that wasn't a little flexible in sizing when changing all 4.

Also looks like you have some fat-finger issues too:laughing:

What kind of tire are you looking for? Mud? All terrain? What are you considering thus far?

 

[beowulf]

Why are you stuck on 235s?

What is limiting you from going a little wider? 245's 255's 265's etc.

Lot of tire choices. You could probably find 5-6 metric sizes that are all within an inch or two of what you have in both width and height. And I have yet to see a truck that wasn't a little flexible in sizing when changing all 4.

Also looks like you have some fat-finger issues too:laughing:

What kind of tire are you looking for? Mud? All terrain? What are you considering thus far?

Thanks for the input.. . and went back to edit my fat finger errors - thanks also for pointing that out (lol).

Anyway, I think I will go with the 235-75-17s as I see that I can order those in a Consumer Reports recommended tire.

The truck is used in Central Calif foothills - not a lot of weather issues - some rain at times. Almost all highway miles as we live about an hour from the town we go to for project supplies, hay or whatever. I drive it maybe once a week, sometimes once every two weeks depending on what I am working on. Unless we really need a pick up, we take our other car to town. I do go to So Cal 2-3 times a year to help daughter with repairs, projects, etc and then need the truck. I guess I put less than 7500 miles a year on it.

The tire I will likely order is the Michelin Defender LTX M/S based on reviews, ability to order it from Costco, and size to be what I have (235/75/17). I looked at the 245 and 255 widths. . . not too much more money (and the increased cost not really an issue), but for some reason less mileage on the warranty for the wider widths (70 k vs 60k vs 50k). They did not show the 265 in a 17.

I guess I will be pulling the trigger today and order as I may need the truck in a week or so.

Again, thanks for the input. I am thinking about your suggestion.

 

[LD1]

I know 265/70-17 is a popular size cause thats what I have

And they are the same diameter (+/- an irrelevant hair) as the stock size on my truck which was a 235/80-17, which is also a popular tire.

The Michelin LTX you mention....I like that tire alot. Specifically the tread design as it does real well in the snow. But I didnt want to pay Michelin prices. But still wanted a quality and American tire. Which is why I arrived at the Mastercraft courser HXT. Real similar tire (tread), quality and American made, and alot less $$$.

 

[John Fitzgerald]

My 2010 F150 has the same size, P235/75/R17 (from factory). I have been told by tire shops they are an odd size. They recommend AT245/70/R17 as replacements. Many more tires are made in the latter size. Also, if your truck is a 4x4, your new tires should be very close to the spare size, or using the spare will damage the drivetrain. The 245/70/R17 is very close in diameter to the originals. I would like to find another aluminum rim like the factory rim and buy 5 new tires so I can work the spare into the normal 6k mile normal rotation.

 

[beowulf]

My 2010 F150 has the same size, P235/75/R17 (from factory). I have been told by tire shops they are an odd size. They recommend AT245/70/R17 as replacements.

That is the same thing I am being told re that size. I could certainly live with the size but have some concern finding a replacement if have a blow out somewhere far from home - I want to be able to buy a tire that matches. I found the 245/70/R17 tires in the Michelin Defender so may order those. I don't have a 4x4, and I don't think I would have major issues if my spare would remain a 235/75/R17 as it would be only a temporary use.