Back in 1981, when Owen Lee and his wife Joan took a gamble on a business opportunity by purchasing a bicycle shop, it seemed a relatively straightforward enterprise. Inventory decisions were simple -- a limited number of manufacturers produced a limited number of models. Mountain bikes were unknown outside an elite group of enthusiasts in northern California. Since then the cycling world has been revolutionized. The number of manufacturers has exploded, and they're now producing numerous models, each available in a variety of sizes and colors. Lightweight aluminum frames have largely replaced heavy steel. Other technological advances, from shock absorbers to sophisticated shifting mechanisms, have transformed old fat-tire cruisers into sleek machines. Through it all the Lees, originally from Jamaica, have adapted and thrived. They've settled on Trek, Giant, and GT as their main brands, and stock numerous models of each. Volume purchasing allows them to lock in discounted prices. Three full-time mechanics means they can provide service seven days a week. They don't employ high-pressure salespeople and they value their customers enough to offer a 60-day in-house warranty for any problem at no cost (flat tires excepted). The Lees, who sell an average of 100 bikes each month, keep their expansive shop open Monday through Saturday from 9:30 a.m. to 7:30 p.m. and Sundays from 11:00 a.m. to 5:00 p.m.