It has 2 ramps for loading and unloading that acts as lock also in down position. When you drop the ramp, it lifts up the caster slightly so dolly won't move away from bike (I'll try to get some better pictures maybe tomorrow). It is low enough to push the bike up, but for me it was easier to just drive up (I'm vertically challenged
). It is very stable with my old RK (1" higher than SERK there for lean more). It moves very easily even one handed. I grabbed the guards and moved it around.
The load ramps have about 10" handles that make it easy to fold up with the weight of the bike on dolly. Also it has two rods that acts as stops for bike, leave the one in front in position when the ramps are down so you don't overrun the dolly.