B7800 to B21 wheel swap?

[Jamo54]

Hi All,
New to the forum and new (old) B21 owner. A good friend has a B7800 and swapped out his 87 hour industrial(?) wheels & tires with turf. Will they fit my B21? Sure looks like it to me, specs show the rears are the same, fronts a bit different? All 6 lug wheels, and all four are free to me. I do help him a lot, so not completely free.
Thanks, and looking forward to learning about my new machine...my first Kubota...

 

[Henro]

The above chart should answer your question…looks like they will fit and work fine. Gear ratio is the same for both tractors.

Edit: I’m not sure where I got this chart…

 

[Jamo54]

Thank You, Henro. I haven't poked around on this forum much yet, but are there online manuals for my B21 posted here? Guess I should look before asking.

Thanks again...
Jamo

 

[edritchey]

They will work if they are this size -

 

[Jamo54]

That's exactly what they are...the "new" ones anyway. Not sure what's on the machine now, as I wont have it for another week or so. I ass-ume they're OE's.
Thanks EdR...

 

[Henro]

That's exactly what they are...the "new" ones anyway. Not sure what's on the machine now, as I wont have it for another week or so. I ass-ume they're OE's.
Thanks EdR...

Since both to B21 and the B7800 have the same front-to-rear gear ratio of 1.672, OEM tires off the B7800 should work fine on the B21, regardless of what you find on the B21 when you get it.

 

[Jamo54]

Easy swap. all went well. I have the old wheels with decent tires available. I don't need them, and I don't want them. Obviously local is best.