Tubes for split rims? Help!

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Joined
Jul 11, 2023
Messages
5
Location
Raleigh, NC
Cart before the horse. After couple weeks of indecision, I finally pulled the trigger on 5 new 33/10.50R15 KO2's for my new to me 77 FJ45. It's a grocery getter, so based off several first-person accounts, decided I could risk 33's without a lift given light use.

New ones got here today and pulled all 5 old tires/wheels, and took everything up to the shop that said they had no problem mounting splits.

. . .then they asked me for the tubes. . .


I've been staring at obvious oddball stems for months, but just didn't register.

Any advice/info on brands/sizes/liners etc would be greatly appreciated. Existing tires are pretty beat, so re-using isn't an option.

Thanks in advance,

Slow
 
Tubes still seem pretty common in agricultural and haulage, so those websites usually have something. You probably won't find many options, but try to find one with a good valve stem for your wheels. I guess the liners won't change size - mine cleaned up pretty well and I just reused them. Otherwise they seem pretty standard
 
My Google-Fu is fairly strong. Brand new to split rims but assume most folks that have/do run them had to deal with tubes at some point. Just hoping to find someone that has been down this road before.

My searching shows TR-75A valves on a 10-15 or 11-15 tube is what I'm looking for?


spent loads of effort trying to find the best price on tires, now it looks like I need $200 in tubes. . .
 
There is a lot of info in the 45 section and tire and wheel section on splits. Sorry I don’t know how to posts threads. Are you sure they are 15”. Seems like most I have seen are 16” splits on 45s.
 
Crap - wrong on my part - I have a 43 - It's South American vintage. Definitely 15's - 235/75-15's on there now. Looking around, it looks like a low platform trailer tube seems to be the best fit. Looks like the tubes come anwhere from 7 to 11 or so by 15. Now I'm stuck wondering do I buy the tube based on the rim size or tire size since I'm squeezing 10.50's onto my 5.5 rim. . . . .

Questions on questions - want to pull the trigger on some tubes today - hoping to to find someone who's been here / done this.

Thanks
 
Use the same principle they use in agriculture tires:

Car Tire Inner Tube Sizes

E.G. 3.00-4, 3.50-6, 4.00-8, 5.20-10, 6.00-12

The simplest size marker is this one. The first component, 3.00, merely indicates the tire’s width and sidewall height in inches. The rim diameter, expressed as -4, is given in inches. Therefore, a 3.00-4 tire would have a 4″ rim diameter, be 3″ broad, and have a 3″ sidewall. The total height of the tire would be 10″ as a result (4″ plus 3″ plus 3″).

E.G. 6-12, 7-14, 8-16, 9.5-18

Similar to the method described above. However, this approach omits the ‘.00’ bit for the first half of the size. All measurements are once more in inches. It is important to note that tires with extremely similar markings may not be compatible; for example, a 6.00-12 and a 6-12 would have very different sizes.

If you alter the tire size on a four-wheel drive tractor, the gear ratios will be affected, which may have more serious repercussions than changing the tire size for a two-wheeled rotavator. If in doubt, stick with the precise size specified by the manufacturer or fitted to the vehicle.

E.G. 4.10/3.50-4, 4.10/3.50-6, 5.30/4.50-6

This time, the tire size is divided into three pieces, each measured in inches. The first number, 4.10, represents the tire’s approximate width when mounted on the suggested wheel.

The sidewall height is the second number, 3.50, and the rim diameter is the third number. A 4.10/3.50-4 tire, then, is 4.1″ wide, 3.5″ height on the sidewall, and it fits a 4″ rim. As a result, this tire has a low profile. It is narrower than it is high, etc.

E.G. 11×4.00-4, 13×5.00-6, 18×8.50-8, 25×12.00-9

This approach is the simplest to learn and is frequently used on turf and ATV tires. The overall height of the tire, measured in inches from the bottom to the top, its width, measured in inches, and its rim diameter, measured in inches, make up the first, second, and third parts.

If you want to modify the size of your tires, you can choose the height and breadth based on your requirements, but the rim diameter must remain the same unless you also want new wheels. A 25×12.00-9 ATV tire measures 25 inches high by 12 inches wide by 9 inches broad.


E.G. 10×3, 18×4, 260×85

Although this technique is getting dated, you can still have tires imprinted in this manner. Inches or millimeters can be used for measurements; if you look at the examples above, it should be clear which. The entire tire height is the first component, followed by the width.

This size designation does not include the rim diameter, but it may be calculated easily because the tire sidewall height will match the tire width. A tire that is 18″ tall, 4″ wide, and fits a rim with a 10″ diameter is known as an 18×4 tire (18 total height minus two lots of 4 high sidewalls).

Therefore, a 4.00-10 would be the size of an 18×4 in current terms. A 260×85 tire has a height of 260mm and a width of 85mm. These measurements translate to a 10″ high, 3″ broad tire mounted on a 4″ rim. The size in use today would be a 3.00–4.

E.G. 145R10, 255/60-10, 155R12, 195/50R13

Since this is the typical method for labeling car and van tires, trailer and caravan tires are also frequently marked in this way. The first component is the tire’s width in millimeters, the second, if any, is the sidewall height represented as a percentage of the width, and the third is the rim diameter in inches.

The tire’s sidewall height is assumed to be 80% of the width when there is no percentage indication of the tire size. Sometimes, a tire with an 80% rating in size, such as 155/80-13, will be shown. When the letter ‘R’ appears in size, it denotes a radial structure for the tire.

In other words, a 145R10 is a radial tire that is 145mm wide, with a sidewall height of 116mm (or 80% of 145mm), and fits a 10″ rim. A 195/50R13 tire would measure 195mm broad, 98mm tall at the sidewalls, and fit a 13″ rim.

By converting both measurements to either mm or inches and multiplying the rim diameter by two times the sidewall height, one may get the estimated overall height of the tire.
 
The size you need is the 750r15 tube… the tr150 is a flexible stem I prefer them over the brass ones …if you don’t have flaps I recommend getting those as well…. They go between the tube and the rim

Any GCR tire center or commercial truck tire center would have both in stock

The good thing about the splits are doing them yourself … there are threads and videos here explaining how to do it
 
Because you are mounting radial tires, you need tubes specifically made to go in radial tires. My understanding is that radial sidewalls flex more than bias ply tires so the tubes need to be thicker.
 
The size you need is the 750r15 tube… the tr150 is a flexible stem I prefer them over the brass ones …if you don’t have flaps I recommend getting those as well…. They go between the tube and the rim

Any GCR tire center or commercial truck tire center would have both in stock

The good thing about the splits are doing them yourself … there are threads and videos here explaining how to do it
 
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