Hello
Yes it is bolted to the frame. It’s all removable, even the rear tire carrier is bolted on. The trailer weighs in around 1,500 lbs dry. Loaded up with a massive gear list for four, food for two weeks, BBQ, chainsaw, solar panels, 4 flats of beer, 22 gallons of water, 14 gallons of fuel, bike rack with four mountain bikes, 15 hp out board, 16’ aluminum boat it weighed in at 2,834 lbs. The FJ Cruiser pulls it well. However my Fj is running 4:56 gears which make a HUGH difference. The trailer does very well due to the suspension. Some fairly long 3,500 lb springs and OEM FJ shocks help allot. Only complaint is the sides are easily punctured by branches and tree tops. Brush is thick up here and most roads are completely over grown in just a few years with thick Alder & Willow. This trailer does not suite my aggressive explorative personality for this reason alone. Other than that its great!