party on the bridge

we pulled up and this biker chick on a black c-check says 'whoa, looks like a cross-check party'. after talking bikes for a bit, the sun set and we headed back into the city. robin took us on a flyer through the presidio and golden gate park. her cross-check was setup ss with what looked like a 39x16 gear. she was fast, even on the hills. better keep up or you'll be lost.