I was looking for Tire chains for my MX 5100. Sticker shock! So a coworker asked if I had considered studding my R4's. I purchased 2 boxes of 250 3/8" studs. About 30 min later problem solved for under $60. I live on a hilly dirt road that ices up and my tractor had a problem with traction. Didn't see posts about studs vs chains so I thought I'd post. I had v bar chains on my BX 25 that worked well but were a chore to install and gave a rough ride. I wish I could compare same tractor but they were both R4 tires. They are especially helpful when plowing.