"mrcheerful ." wrote in message
...
The only time I have wanted wheels at the top has been sideways wheels so
that I can slide the ladder to right or left, [snip]

I fitted wheels to my ladder and found them a useful addition, but IMO the last
thing you want is sideways wheels as there would be a very great danger of the
ladder crashing to the ground sideways when even the slightest sideways force
is applied to the job.

Roger