Tires 12.4-16 R4 for B7800

[fireguy8891]

I bought a used B7800 at an auction thet has 12.4-16 r4 goodyear rear tires. Both are in good shape, but the diameter is 3" different causing the tractor to lean. The tractor is 4-wheel drive also. My 2 questions are: Which is the correct diameter? (they are approx 37 1/2" and 34 1/2") and Where can I find this tire at a reasonable price? ( Kubota wants $490 per tire)

 

[Northland]

23X8.50-14R4 / 12.4-16R4 - see attached PDF

As for finding new tires that would depend on where you live. I would do a Google Product Search -

http://www.google.com/products

 

[fireguy8891]

The specs just specify a 12.4-16 r4. Both of my rears are that size, but there is a 3" difference. What is the diameter of your rear tires?

 

[Northland]

That's bizarre that your tires are two different sizes. My Goodyears are 34.5"

These are a bit cheaper then quote
TIRE (12.4-16R4) 32701-50130

 

[fireguy8891]

Yeah it is strange especially since they are both Goodyears. I really appreciate the help.