Sustainable trailer towing

摘要

“Here’s a question you might con-sider in your column," a motorcycle dealer said to me a few weeks ago. "Why am I selling so many bike trailers? I used to sell only one or two a year, but now the number is way up. Why do people suddenly need to haul bikes on trailers?" I have to admit I was momentarily stumped. This doesn't happen very often, unless I'm pondering a Unified Theory of the Physical Universe, or wondering if I should spring for synthetic oil at $8.99 a quart in my KTM, or just get a premium brand of mineral oil for $1.99. And if synthetic oil isn't made from "minerals," what's it made from? Tree sap? Distracting questions, all of them. But back to trailers.