If you like to bike in Miami, you know Mack. It's been here for a half-century. You might well know Manny, the mechanic who has done repairs for the past 38 years. Heck, you even might have perused the great clearance deals online for last year's bikes or dreamed about that 15-pound, $12,000 Pinarello the store carries. The best thing about Mack, though, is the people. Many are serious bikers who compete in triathlons. When you buy a bike, these masters of the trade fit you like nowhere else. They not only adjust the seat but also study the derailleur, the crank, and the pedals — everything that could cause a problem down the road. You can also get great cycling clothing here cheap. A jersey goes for as little as $19.95. So hit the Mack, and you'll come back.