Locking helmet to the bike

[nick crisp]

Is a topbox that expensive, heavy or impractical ?


Please don't mention aerodynamics as I'm stunned at the difference between the rolling resistance of a bike vs car when off the throttle.

No, none of the above. I don't know, I just don't want to have the rack on the bike all the time. I had a topbox on my last one, and of course I loved it's practicality. I could see me doing it again if I can't find another practical solution.