Widen rear tread width

[Jesser02Ex]

I have read several posts here about widening the rear tires on my 5220R. My tractor has a dish/rim combo that allows the most flexibility for width. Since I have not done this before, I wanted to seek validation before I tackle this task. Once widened, I will fill the tires with a 50% window washer mix.

Here is my manual page, it says nothing about the dish/rim combos.



My inner dish is turned to give the most spacing:


I believe all I need to do is unbolt the rim from the dish and move it to the outside inner dish and torque the bolts per the manual.



Am I missing anything? I have everything to chock the front wheels so it will not roll as I lift the rear of the tractor.

 

[ericm979]

You could check with the dealer that the setup you plan to use is approved. It should be in the manual.

You'll need a way to move the rim and tire around without it falling down (it'll be really heavy) and a way to line it up to get the bolts in. Some people here have used a greased sheet of plywood. If I was doing it I'd chain it to the ROPS or something else so it wouldn't fall over.

 

[dieselcrawler]

You should look at the mounting bracket on the wheel, if it's offset closer to one side or the other, you can gain/loose width if you swap tires/wheels side to side as well.

 

[ovrszd]

You should look at the mounting bracket on the wheel, if it's offset closer to one side or the other, you can gain/loose width if you swap tires/wheels side to side as well.

Yep. Looks offset.

Currently it's offset in plus mounted inside the center. A lot of width to be gained.

 

[Jesser02Ex]

Eric, thanks for the idea of using the ROPS to keep the wheel upright.

Richard, yes the dish is pushing outside, the well is inset on the dish. I’ll mice the wheel to be outset on the outset dish. I believe this will give me maximum offset with factory adjustments.

Thanks all

 

[oosik]

View attachment 586200 OK. This is from my Kubota M6040 OP Manual. The first bigger sketch shows one position with the hub dished inwards. If your welded attachment tabs, on the outer rim, are offset, there will be three more positions, with the hub dished inwards.

The next four sketches show the four positions with the hub dished outwards.

Each of the eight positions is only an overall change - in total width - of a few inches. However, the idea being - ideal width when doing row crop farming.

The reason Kubota does not recommend the added three positions when the hub is dished in - possibility of the outer tire making contact with components of the tractor.

So, if the attachment tabs on your rims are offset - you too will have eight width positions. No matter what you do - - be certain that there will be adequate clearance if you do make width adjustment.

 

[ptsg]

This is from the 15 series. It's odd that they didn't put that info on the 20 series for some reason.



The dimensions won't be the same as this is a smaller size tractor.

 

[Jesser02Ex]

It is odd that it wasn't included in the 20 series manual. You have posted this image before and I referenced it before checking my manual in hopes I would have the same graphic. I also looked at a downloaded manual for the 20 series, it also excluded this graphic.

My rear wheels are currently set to "E", but I will move them to "F" for maximum stability. Thanks for re-posting this graphic.

This is from the 15 series. It's odd that they didn't put that info on the 20 series for some reason.

View attachment 586202

The dimensions won't be the same as this is a smaller size tractor.

 

[CobyRupert]

My rear wheels are currently set to "E", but I will move them to "F" for maximum stability. Thanks for re-posting this graphic.

Not exactly maximum. The diagram shows the tabs in the center of the rim width. As overszd noted, the tab on the outer rim is offset (not in center of rim's width). - Or looks to be anyways. If you move that tire to opposite side (so that tread direction remains correct), then the tire spacing will be maximum width (stability).

 

[ptsg]

To be honest, the diagram they provided can be a bit confusion as they didn't draw the axle so we could have a reference on what is the inside and the outside of the wheel.