When buying a Self Propelled Wheelchair like a Karma Ergo 115 it would always be advisable to get assessed to find the right fit and size. There are many low quality Self Propelled wheelchairs that just are not good enough for posture or pressure distribution.
At Southern Mobility Services in Basingstoke we are often asked for self propelled wheelchairs with Attendant brakes which are really useful when a user has to be pushed