Fig. 4From: Manual wheelchair downhill stability: an analysis of factors affecting tip probabilityExperimental sequence of events for wheelchair rolling over a medium bump (1.91Â cm) at 3.92Â km/h.(1) wheelchair released on slope, (2) casters impact bump, (3) the momentum of the wheelchair causes the casters to launch over bump, (4) rear wheels impact bump while casters are still in the air, (5) wheelchair continues rolling down slopeBack to article page