We had rode them in the snow and we were in WV on the Hatfield McCoy trails. We don't beat them but mine went first, I noticed the boots were twisted and when I would back up it made a clicking noise, then I noticed that going forward it made the same clicking noice when I turned to the right. When we got home I was backing hers from the trailer and I heard hers doing it too so I called the dealer and he said bring them both in. I haven't talked to them about why it happened, I'll do that when I pick them up this week. I'll let you know what they say. We love how they ride, we have them on the softest shock setting and they ride so smooth, but we had a Recon ES and a 250EX before so they ride a lot better than they did.