The Stanley SXWTD-FT585 transport trolley is not specifically designed for transport over stairs. Although it is robust and versatile, with a load capacity of up to 137 kg as a platform trolley and 70 kg as a sack truck, it lacks special features such as wheels or mechanisms to facilitate safe transport over stairs. For transporting an 80 kg pot over 4 flights of stairs, it would be advisable to use a transport device specially designed for stairs to ensure safety and stability during transport. The Stanley SXWTD-FT585 is better suited for flat surfaces and smooth surfaces.

Yes, it arrives fully assembled. The 2 smaller ones are retractable. It's a great product that's well worth the price.

No. That would not work with the compact folding mechanism.

If the goods to be transported are well tied down, then yes. The hand truck is very stable and has good wheels.

I have never tried that. But I think it's impossible. 130KG, everything sags on the grass. It doesn't depend on the scooter