... coupler depend up on requirement of country Swivel Jockey wheel Tyre: 165/70R13,185/70R14 185R14C(LTR) 185R15C, 195R15C Shackel Spring ... 39mm round, 40mm square solid axle optional Hot dipped galvanized Trailer weight:210KG Load capacity:750KG Electric brakes, disc brakes, hydraulic ... tough to carry stuff, always stays behind your car quad trailer