Zipp 900 Tubular Wheelchair - 700cZipp 900 Tubular Wheelchair 700c Starting with race proven 900 disc Stub axle, durable oversized bearings and scuff resistant layer to prevent damage from your gloves High density co moulded inserts to accept virtually any size of hand ring Wheelchair version gives the same aerodynamics, comfort and control for which the 900 is known Dimpled surface Outer width: 20mm Weight: 1084g