The spine is stiffer than the regular Atlas Step On, so there's far less lean-back while the twist stays about the same. It weighs around 900 g each, a little more than the regular Atlas Step On (850 g). There's almost no adjustment for centring the boot in the binding — the heel loop doesn't slide in or out, so it's hard to balance toe and heel drag. The gas pedal is the only adjustment, and because the full-size disc mounts like a mini disc, there's no stance width adjustment either.