[DIVx0]

I wonder how well this would work on carpeted stairs? Since the treads are gripping only the 'nose' of the stair is there the possibility of slippage on the pile? What if the padding gave way or the treads pulled the carpet away from the stair?

How well would this chair recover from scenarios like this? Or in any failure for that matter.

It certainly looks like it has a lot of promise!

[Asbostos]

It probably won't be a problem because people sometimes walk like that one stairs too (at least I do!). For walking the loads would be higher because they're concentrated on one foot on one edge of one step. The failure mode of the carpet pulling away is interesting though! A walking person might just fall onto the next step while this wheelchair looks like it could keep popping the carpet out step by step as it falls all the way down.