Wheelchairs, Mobility Scooters and Accessories Mobility & Daily Living Aids, Mobility Aids & Equipment, Motorized Scooter Accessories Pride Jazzy Power Wheelchair Rear Caster Review by RoomPony July 5, 2018 No Comments This is a new rear or mid-drive wheel for most power chairs. Including Pride, Merit, Golden, Invacare, and others. It is a size 200mm x 50mm or 8 x 2 inches. The axle size has to be 5/16 inches and does include the bearings.