Give me a day to find the chain bag so I can get you the exact size and manufacturer. Until then, I can tell you this much:
I got them from Alderman's. Their web site is
http://www.aldermans.com I usually am in touch with Tim Alderman via email. I let him know what I'm looking for and he passes it along to his staff. They have been quite helpful...and very patient with me.
The chains they found for the front tires are a simple "ladder" configuration with a 2 link spacing. The ones for the rear tires are the ladder style with a 4 link spacing. The ladder configuration means; if you stretch the chain out on the ground, what you see looks just like an extension ladder (aka a continuous H pattern). There are NO diagonal cross over strips or loops or wedges.
I learned more about chains from these sources:
http://www.peerlesschain.com
http://www.bbchain.com
http://www.labonville.com
The Labonville catalog explained alot about special chains for the logging industry. But their sizes weren't much help. I suppose I could have called them but Alderman's was pretty easy-they are just a short drive up the road from me.
Remember, the available size and style depends on your tire size! So be certain you read the tire size from the sidewall. I have seen enough errors in manuals to be distrusting of them.
I learned that there are two general classes of chains: really good ones and OK for for light to medium duty use. The really good chains will be twice the price of the others. The main difference in the two classes is the hardness of the steel and the number of links. Really good chains will have very good steel and be properly case hardened. The half price ones will have standard chain steel and only be slightly hardened. Mine were made in China. Russia, Norway, Finland and USA all make supper high quality chains for the logging industry (see Labonville reference above). When my Chinese ones clink together they don't sound like heavy case hardened steel. I paid about $70 for the set on the fronts. The rears were about $120. Don't get me wrong on this. These are perfectly good chains! I use them on pavement and they only show a little bit of wear on them-mostly paint scratches. I'm just not sure how long they would last if I were using them to plow pavement every day of the winter. For the last 6 weeks, all we in lower Michigan have been getting is mosly rain and 50 degree days.
I'm not certain of the amount of air necessary in the R4 tires while using chains. I'm still experimenting. I can say this, at 40 PSI the rear tires fit the chains nicely but the ride is a little bouncey. I am going to try 30 PSI for the next snow fall to see what changes occur.
One other observation I have noted, don't try to make sharp turns (steering locked to the left/right) while the chains are getting lots of grip. When I need to turn real sharp and the chains are not slipping, I pop it into 2wd for the turn. Once the turn is comple I then pop it back into 4wd.
On a personal note, I'm perfectly happy with them! Nothing like having good traction while plowing up hill! I'm not sure I get this much traction in sand during the summer months. I'm certain I was smiling the first time I used them, I sure was happy to have them!
Peter