Newbie here. I just bought a set of ladder type chains from the Kubota dealer for my B7510 with AG tires. No matter how hard i try, they just don't seem to be long enough to fit so that I can lock them in. I jacked up each tire so I could adjust all around but still come up short. I gave the dealer the number designation right off the tires so it must be me. any help is appreciated.
The trick to chains that work well is that they fit tightly.
I'm not sure you will ever be able to get a set of ladder chains to fit on Ag tires very well. And if you do, the chances of doing it twice are slim.
Chains can work very well on Ag tires, I've used them on my 2Wd JD with Ags for several decades worth of winter snow plowing. And I've built a number of Ag tire chains.
Used school bus tire chains are a good source of decent chain without spending so much for the basic materials. After that it's just metal work.
Ag chains are not parallel ladder types. Ladder chains are for tires with smooth tread. Ag chains start out built the same way as ladder chains but the ladder rungs are slightly longer so they can go over the lugs and there are more of the ladders so that adjacent "rungs of the ladder" can be connected at the center to form a series of independent ladder pairs. Each ladder pair then has an X or H configuration.
Doing chains for Ag tires requires more chain and more work and this is more expensive. Often almost twice as much. Since the chain now sits partly on top of the lugs, you are effectively building the chain for a larger diameter wheel.
A shortcut for quick Ag chains that fit is to buy them slightly too large and then jack up the wheel as you've done, put them on, and then see if you can shorten the chain until it fits tightly. After they are run a few times they will stretch for a better fit. If this works for your tire, you will find that starting too large and shortening the chain length just causes the entire chain basket to fit around the faces of the wheel a little closer to the center. That's actually an advantage in deep soft snow.
By contrast, the only good thing I can say for lengthening chains that are too small to begin with is that the resulting chain is sure a lot better than not having chains at all. The same goes for automotive type ladder chains.
BTW, I like to use the rubber center tensioning webs when I have some that fit. I ALWAYS safety wire the locking closers, and personally feel more comfortable with chains when the tractor has good steel fenders.
probably more than you wanted to know about chains, but I hope this helps...
rScotty