Not long enough. Good product, works as advertised. But it's too small for what I need. To fit my tires over the trailer rails, they were about an inch shorter. I have pretty standard 4" trailer rails?) and ST205/75R14 wheels/tires. (I ended up going with the longer 12" U-bolt version, but it didn't have locknuts, so I kept those too and combined the two with locknuts for the 12" version.)