As a kid, you made your bike uniquely rad via baseball cards, banana seats, and sound effects that made you spit all over your own face. Get rad without the saliva, at Keirin. Named after Japanese fixed-gear velodrome races (one gear, no freewheel, no breaks), Keirin specializes in customizing unique bikes, whether that means building a new, super-minimal fixed-gear number that weighs less than a bowling ball, refurbishing vintage keirin bikes with new tech, or tricking out your middle school bike with high-end components, and colorways that look like a sneakerhead convention on wheels. Pick a frame (or use your old one), keep the colors or custom paint it (their polycoater can generate pretty much anything, and add sparkles -- sparkles!), then choose rims, pedals, crank sets, hubs, spokes, seat posts, and even chains, in colors like vibrant yellows, greens, reds, or the stealthy all-black (screw Kawasaki -- you are the ninja). In addition to hard-core fixed-gear bikes, Keirin will also carry some street bikes (for those into long-distance riding), and Marin mountain bikes (for those into looking like they mountain bike). Keirin also rents beach cruisers, and is having a grand opening bash on February 11th (7-10pm) with free suds, BBQ, a 2 km race from the shop to Shiso sushi resto, and in-store races where you go head-to-head on a roller system that measures your speed -- if you thought your spittle sound effects were great back then, just wait 'til they're supercharged with beer.