My Kioti DK35's tires are close to yours. If you are planning on ladder type as shown in your photo I recommend 2-link ladders rather than 4-link. I originally tried 4-link ladders on my R3 tires. They were smaller gage old truck chains and got lost in the treads. Larger chains would not get lost as badly but patterns such as DUO, H-pattern and the Euro-styles louNY do a better job of keeping the chain out of the tread.
RNeumann's suggestion for front only may work. Some suggest running front-only can harm the front end but I don't think that is the case as long as you don't operate aggressively and spin the tires a lot.
As LouNY states about DUO's; they can be very rough. I was not happy with mine and converted them to the H-Pattern as shown in this link:
http://www.tractorbynet.com/forums/...ed-modifications-post3150916.html#post3150916
It made a huge difference.
I got H-pattern chains for the front and am very pleased with them. They are a lighter gage than the rears. Here is a link showing my front H-pattern chains:
http://www.tractorbynet.com/forums/...hains-dk35se-cab-post4071972.html#post4071972
I had 2-link ladders on the front before that and they worked well as shown here:
http://www.tractorbynet.com/forums/...cknow-snowblower-post4063330.html#post4063330
but they were worn out and interfered with the front components. So I added front spacers and light H-pattern chains. The space for my rear chains is also very tight and I may add rear spacers next year so I don't have to be so fussy about installing the chains. (I won't do it until then because the chains are on now and I don't want to mess with them again until spring).
If you go with front-only chains the smaller gage H-pattern may be a good choice. They are lighter and easy to install. If you found they were not enough you could always add rear chains later.
One thing...chains make a huge difference in snow.
