From reading about Chubby I recall the greatest complaint being the vulnerability of the cloth when the sharp edges of the bike push against it. I think the solution might be extra padding increasing the bulkiness of the bag. The bike itself is actually quite sturdy. The vulnerable pieces are clamp screws that can be bent when they stick out - you should be OK when you screw them tightly in. I ponder about safety of the Chubby's alu frame when in airline luggage. When I traveled with backpacks I had an alu frame bent by airline.