Wider wheels/radials for M7040/M7060 Kubota now easier. FYI

[mopardude318]

This is a typical setup over here. R1 Radial tires. I don't know the size though. Some also have a slightly larger radial tire.

View attachment 633700View attachment 633701

Those are nice big wide wheels/tires. I went with R4’s on my M7060 made by Titan, but traction does lack for sure in the mud. I did want the wider footprint though with the R4’s

 

[Bavarian]

If you plan to change to a different tire size, some of the users overthink the procedure. You don't need the internal gear ratio front to back. All you need to do is calculate the ratio of the rolling circumference between front and back.

Every manufacturer has the circumference listed in each tire's dimensions. Use a tire that's close to what's been on there.
And keep one thing in mind, it's not a swiss watch. If you do a lot of loader work, the front tires wear down faster than the rears and this causes to change the ratio already.
All I want to say is, if the circumference is within an inch or two of the original tire, close enough.

 

[PSDStu]

Anyone have a picture of their M7060 with the 360/70R20 on it?

I have the 320/85R20.

Does anyone know if the 360/70R20 tire will fit on the Kubota Rim used for the 320/85R20 tire?

 

[sixdogs]

Does anyone know if the 360/70R20 tire will fit on the Kubota Rim used for the 320/85R20 tire?

I know that the 360/70R20 and 320/85R20 both have the same rolling circumference and both will go the 20" wheel so I just presume they are for the same wheel. They would have to be. Can someone else comment on this?

 

[Bavarian]

Yes.

See the attached screen shots I took. The W11 rim is red highlighted. I assume this would be the first choice for each size of tire. Make sure your rim IS a W11.

 

[PSDStu]

Thanks to both.

I want to add a wider front tire to my 7060 and have decided on the Kubota Rim/Disc, but not decided on which tire yet. 360/70R20 or the 320/85R20. looks like both will fit on the same rim.

 

[ovrszd]

Thanks to both.

I want to add a wider front tire to my 7060 and have decided on the Kubota Rim/Disc, but not decided on which tire yet. 360/70R20 or the 320/85R20. looks like both will fit on the same rim.

What reason would there be to not go for the widest one?

 

[sixdogs]

What reason would there be to not go for the widest one?

Metric is greek to me and is one actually wider or is it the relationship between the width and sidewall?

 

[ovrszd]

I totally understand that feeling Six..... I struggle with it also.

Here's a Google explanation.

The two-digit number after the slash mark in a tire size is the aspect ratio. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire's width. The bigger the aspect ratio, the bigger the tire's sidewall will be.

So in our discussion.

The 320/85 tire is 320 tread width. The 85, 85% of the 320, is the tire height, converted to 272. This converts to 12.6 inch tread width.

The 362/70 tire is 360 tread width. The 70, 70% of the 360, is the tire height, converted to 252. This converts to 14.2 inch tread width.

Kubota says either will work in regards to height.

Standard measurement did the same thing in regards to tires back in the late 60s with 78 series, 70 series, 60 series, etc. tires. The number represented the percentage of height compared to the width. You were somebody if you ran 60s on the rear tires of your Mustang.

 

[sixdogs]

ovrszd--I checked the rolling circumference on both of those tires a while back and it was the same. That would mean the tire height of both of them has to be the same. And, in photos of the Kubota factory tire and wheel, the tire sure looks wider than the 11.2x24 OEM that was on there to begin with. This is where I struggle because something is not right.

Am I making any sense? Wait; don't ask my wife.