This kayak trolley is very easy to install and use. the large solid rubber tyres roll smoothly across sand, gravel, and road. It is a great trolley for you to transport your kayak and save your energy.Features:Aluminum kickstands, very sturdy and durable.Large solid rubber tyres roll smoothly across sand, gravel, and road.The top parts of the kickstands are inserted into the kayak bottom scuppers and the EVA cushions help to protect kayak whilst being transported.The width of the unique crossbar is adjustable with a screw to accommodate different placement of scuppers.Very easy to install into the tyres with two buttons.A great trolley for you to transport your kayak.Specifications:Material: Aluminum + RubberLoading Capacity: 50kgTyre Size: 26 * 7.3cm / 10.24 * 2.87in(D * T)Crossbar Width: 29 - 42cm / 11.42 - 16.54inWeight: 1.9kg / 4.2lbPackage Size: 54 * 39 * 10cm / 21.26 * 15.35 * 3.94inPackage Weight: 2.3kg / 5.1lbPackage List:1 * Kayak TrolleyNote:Please allow 1 - 2cm (0.4 - 0.8") differences due to manual measurement, thanks.