A Bike for All Seasons: Thanks to fat, under-inflated tires, biking no longer has an off-season

摘要

THE WINTER MORNING Would hardly seem right for a bike ride. A fresh snow had fallen overnight atop the old, refrozen sheets and piles of snow all around. A chilly wind blew fine, stinging grit. The sidewalks were mostly invisible, the roads an uninviting mix of brown slush and salt. And yet there was my 14-year-old son, Jack, on the walkway beside our shed, checking the tire pressure on a thick-framed black bike.