I have 4 of these (two sets). They're fairly robust, I haven't had my 3600 on them which I believe is in the 5k range, but they worked very well under the Duster (about 3,200 lbs.). I wouldn't hesitate to use them on a 5k vehicle. Moving a vehicle around is a breeze with a set wheel dollies and the first time I used them, I kicked myself for not buying a set much earlier. Sure beat tugging and pushing a rig on two floor jacks.


RonR


1951 3600 with Clark flatbed, T5, 4.10 rear
1970 340 Duster
1990 5.0 V8 Miata (1990 Mustang Gt Drivetrain)
1964 CJ5