9 x 24 tires?

[Ben B]

Well folks, it finally happened. My original Goodyear tire finally got a hole in its inner tube and thus ripped the tire in the process. It was already ripped between a couple of tread bars, but now its tearing apart. It will hold air if the hole in the tube is down toward the bottom. Obviously the fluid isn't letting the air leak out when its parked like this. But anyway, it's done for as you can see in the photo.

When I got to checking it, I discovered that my Cub has two different tire sizes on the back. The Goodyear that has failed is a 9x24, and the Allstate that is still in decent shape is a 9.5x24. I also found that this is not a typical size for a cub. Are these wheels off of an A?

I'm debating on whether or not to just go ahead and buy 4 new tires while I'm at it, because the front ones are just about worn slick as well. My local tire guy said he can get me a Sampson Ag tire for a couple hundred bucks. I've not decided what to do just yet because I just now finally got it running again after 2 years of fighting a defective float valve. (But that's another story)

[ScottyD'sdad]

I have 8.5-24 and 9.5-24, on different cubs. Both size tires work well, on the cub rims. Mine vary, depending what they were wearing, when I got them, or what size I can scavenge,when I need one. 8.5's are cheaper, if that makes a difference to you.
Ed

[Ben B]

Okay thanks! I forgot to mention that my wheels are 8x24 instead of the typical 7x24 cub wheels. That's why I was wondering if they were wheels from an A model. I have no idea if they even interchange or not.

I'm also going to remove this tire myself and inspect the wheel to see if it needs to be replaced. My Dad had to replace his wheels on his '67 when he replaced his tires because the wheels cracked when the dealer tried to dismount the tires.

I really don't need a brand new tire. This tractor is nowhere near a show tractor. It's a hodge podge of casting numbers, and it's been wrecked and cobbled back together. It's a work horse though, and that's what counts for me. I'm just trying to get some ideas together as to what I should do, and I welcome any and all input from you folks!

[ScottyD'sdad]

"A" rims don't mount on a cub wheel center, unless the wheel center is ground down, and modified.
Frequently, rims are rotted from leaking calcium chloride tire ballast. Good idea to clean and paint the insides of the rims, while they are apart.
Ed

[Jim Becker]

Cubs originally with 8.3 or 9.5 inch tires used the same 7 inch rim. Rim widths are measured from the inside of the bead surface and are typically at least an inch wider if overall width is measured. From the picture, it appears that you have a Cub rim but it is nearly impossible to say from the side in the picture. It is fairly obvious from the other side. (One side of the lug should be centered on the rim.)

Rim measurement:
http://www.millertire.com/faqs/

[Ben B]

I do appreciate the information. I plan to take a reciprocating saw to the tire and cut it apart and off the rim. Then I can inspect it to see if a replacement will be necessary.

Is fluid in the tires truly necessary? I have rear wheel weights already.

[Eugene]

I do appreciate the information. I plan to take a reciprocating saw to the tire and cut it apart and off the rim. Then I can inspect it to see if a replacement will be necessary.

Is fluid in the tires truly necessary? I have rear wheel weights already.

Fluid may or may not be necessary. Your choice. If you are going to use fluid, pick something that will not rust/eat up the rim.

Removing the tire from the rim is not difficult. Some tractor place where you don't care if you kill the grass. Tire with valve stem down, remove valve stem. Let tractor set over night with weight on tire, there will be some fluid left in the tube. Morning, wash everything off with tap water. Jack up and support tractor. 2 or 3 flat pry bars, drive in between bead and rim, twist. Move 2nd pry bar over a couple of inches, repeat. Work around the rim on both sides. Pop tire and tube off rime. Drain the tube. Wash everything off with tap water.

Depending on rim damage, pits and rust spots can be repaired with epoxy. If the rim's bead is damaged, it can be cut away and a new bead welded in.

[Ben B]

Thank you all for the replies. I think I can handle changing the tire myself after you describing how to do it. I have checked and measured again and found out for sure that I do have 8 inch rims. And, they are galvanized! Is that standard? I have no idea were they came from. Hopefully being galvanized will have prevented rust.

Here's a photo of my "good" tire, which isn't great but it still holds air and hasn't split yet. But, it is dry rotted and cracked around the tread bars the whole circumference of the tire. It's an Allstate tire. And, after seeing this, it makes me wonder if it was purchased with the rim already mounted to it because the tire itself says its "On 8 inch rim".

[Scrivet]

......... And, after seeing this, it makes me wonder if it was purchased with the rim already mounted to it because the tire itself says its "On 8 inch rim"...........

That's telling you that the tire will be 9.5" wide (sidewall to sidewall) when installed on an 8" rim. A narrower rim will have the sidewalls pulled in closer and you won't get a full 9.5". A wider rim and the sidewalls will be spread and the measurement will be larger than 9.5". Go back to the Miller Tire link in Jim's post and look at the chart and the "old size/new size" section which will explain it in more depth.

[Bob McCarty]

All the early rims were galvanized, but if the fluid was leaking you may have some rust on the inside of the rim.

Bob

[Ben B]

Well, further inspection has revealed that this particular rim is severely rusted around the valve stem area. A screwdriver can be easily inserted through the crumbling metal in the area a few inches around the valve stem. I am thinking about going ahead and replacing the both with new wheels and tires, and then I'll never have to worry about them again.

[Clemsonfor]

Cubs originally with 8.3 or 9.5 inch tires used the same 7 inch rim. Rim widths are measured from the inside of the bead surface and are typically at least an inch wider if overall width is measured. From the picture, it appears that you have a Cub rim but it is nearly impossible to say from the side in the picture. It is fairly obvious from the other side. (One side of the lug should be centered on the rim.)

Rim measurement:
http://www.millertire.com/faqs/

I know this is an old thread. I was searching the topic for my own information. I know there was a change in the tire measuring and or sizes. So I found this thread off a Google search. I am not buying new tires right now but at some point will need them. I am trying bto understand the difference here. I read the posted link, and am still somewhat confused. While understand a wider tire will balloon more on a narrow rim I do not understand how the old size and new size compare to each other. The cub currently has old really old 9x24 tires on it. When they need to be replaced do the new 9.5x24 or 8.3x24 come closer to the original size?

Or if someone could explain what the miller tire link posted is saying along with the chart in a more clear description.

[Jim Becker]

The old 9-24 is essentially the same tire as a new 9.5-24. I can't explain the linked page any better than Miller did. If you have a specific question somebody may be able to answer it.

[Clemsonfor]

The old 9-24 is essentially the same tire as a new 9.5-24. I can't explain the linked page any better than Miller did. If you have a specific question somebody may be able to answer it.

That was the easy answer I was really looking for. That 9.5x24 is essentially the same size.

[Gary Dotson]

The old system was measurement of tread width, later system is a measurement of section width, the widest part of the tire.