B7800 to B21 wheel swap?

Jamo54

New member

Equipment
B 21 TLB
May 24, 2024
11
2
3
Lee Center, NY
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

Well-known member

Equipment
B2910, BX2200, KX41-2V mini Ex.
May 24, 2019
5,397
2,577
113
North of Pittsburgh PA
IMG_1858.jpeg


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

New member

Equipment
B 21 TLB
May 24, 2024
11
2
3
Lee Center, NY
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
 

Jamo54

New member

Equipment
B 21 TLB
May 24, 2024
11
2
3
Lee Center, NY
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

Well-known member

Equipment
B2910, BX2200, KX41-2V mini Ex.
May 24, 2019
5,397
2,577
113
North of Pittsburgh PA
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

New member

Equipment
B 21 TLB
May 24, 2024
11
2
3
Lee Center, NY
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.
IMG_4590.jpg
 
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