i did a harbor freight trailer, they do bolt together, i ended up bolting and welding it together. when you assemble the trailer, the bearings will be in the hubs, but they have hardly any grease in them. thats what alot of people don't check, and thats why the bearings fail so soon. so when you get it, pull the bearings and pack with good grease. no need for bearing buddies. buy and extra wheel/tire from HF as well as a back up, they are cheap. you can also buy a full set of backup bearings from redtrailers.com they are 25mmx52mm taper bearing add a HF wheel chock on top of a plywood deck and your good to go, i hauled my multistrada to colorado and back, i used it to haul 2 bikes to deals gap and back, 2 bikes to florida and back, and my buddy used it to haul 2 bikes to the gap and back as well. i used it quite a few times hauling my bike to the track too. bearings only got warm, not hot. in the time i owned it i didn't have to regrease the bearings. i had no issues with the trailer at all. i had ran 80 MPH with it and again no issues. i just checked with my hand to feel how warm the hubs were getting to make sure any time i stopped. good little trailer for the money. JUST REMEMBER TO PULL AND PACK THE BEARINGS WHEN PUTTING IT TOGETHER