You know how in the last few years the bolts on the wheels of big trucks have turned into spikes and fancy chrome-plated things? Turns out those aren’t shiny metal objects but just lightweight plastic bolt covers. Also turns out that the spring-loaded plastic bollards used to delineate bike lanes are at exactly the right height to knock them off. (If you want a mix-and-match set of bolt covers check out East Marginal Way between downtown and Spokane Street – there’s one about every twenty feet.)