SundayRoast said...
Shopping trolley wheels would probably be great for bitumen, but thinking more along the lines of pneumatic wheels (anyone now the diameter of the wheels they use on turfdogs?), to cope with either short grass or hard sand for a slightly more forgiving surface !!!
I have a landboard, not a turfdog, which has pneumatic wheels about 12-14cm in diameter. You have to pump the tyres up really hard to get any sort of motion on grass.
I was amazed how much grass, I was on the local oval, held the board back.
I was hoping to use it in light winds to keep my hand in, but the grass was so slow that I needed a pretty strong wind for it to work, so strong in fact I could have gone normal sailing.
It works really well in an easterly at the local shopping centre carpark, however if I was to keep using it there I would rebuild it down and use skatey wheels at the back and some sort of castor system at the front, a-la the Turfdog.