3. Cop skater style It's hard to say how these things get decided, but among the tragically hip, lightweight and aerodynamic helmets specifically made for biking are as out as fanny packs. Case in point: Only hybrid riders wear them. But for some reason, wearing a skateboarding helmet while biking is dope. Whatever, they protect equally well. Giro and Bell make bicycle helmets that look like skater (or BMX) helmets, which are more rounded and human head–shaped than the amphibious-looking bike helmets of the ’90s. They come in an array of colors in matte and sparkling finishes. Freewheel and American Cyclery sell them for between 20 and 40 bucks. Skates on Haight sells actual skate helmets online for $20.

4. Just don't commit suicide Road bikes are more the rage these days, but it's hard to look out for wayward traffic while leaning over those drop handlebars. Cyclocross interrupter break levers ($20–$40) install at the top of the bars, near the stem, allowing road bike riders to sit upright. Since these levers connect to the housing instead of to your lower brakes, they are a much better alternative to the old-school versions often referred to as suicide brakes. Valencia Cyclery will retrofit your vintage road bike with these for $30. SFBG

Freewheel Bike Shop

1920 Hayes and 914 Valencia, SF

(415) 752-9195, (415) 643-9213

San Francisco Bike Coalition's Report Card

www.sfbike.org

San Francisco Cyclery

672 Stanyan, SF

(415) 379-3870

Valencia Cyclery

1065 Valencia, SF

(415) 550-6601