Environment Transportation Quote of the Day: All Bikes Weigh Fifty Pounds By Lloyd Alter Design Editor University of Toronto Lloyd Alter is Design Editor for Treehugger and teaches Sustainable Design at Ryerson University in Toronto. our editorial process Facebook Facebook Twitter Twitter Lloyd Alter Updated October 11, 2018 Migrated Image Share Twitter Pinterest Email Transportation Active Automotive Aviation Public Transportation Leslie Scrivener writes in the Star about the problem of rampant bike theft, and the proper way to protect your bike, including painting it pink, using two expensive and heavy locks, or riding a junker. A commenter pointed out (what appears to be a cliche but new to me): "All bicycles weigh fifty pounds. A thirty-pound bicycle needs a twenty-pound lock. A forty-pound bicycle needs a ten-pound lock. A fifty-pound bicycle doesn't need a lock at all."