As Sacramento’s bicycle scene continues to grow, be it among fixed-gear aficionados in Midtown or hardcore racing fans, a decades-old indoor cycling sport is gaining popularity – Gold Sprints. “It started out 50, 60, 70 years ago,” said Dean “Dino” Alleger, a mechanic at Rex Cycles, 1811 E St. “It had two fixed bikes and a big clock with wires, but now it’s all digitized.” Alleger said the basic premise of Gold Sprints is that racers use fixed-gear bicycles mounted without their front wheels while the rear wheels rest on rollers. When the race starts, racers “pedal like crazy” for 500 meters or one kilometer, and the computer keeps track of who wins. “Gold Sprints are all indoors, and t

Bicyclists are gearing up for a Sunday ride to benefit the American River Parkway, which faces reduced funding this year. By Monday afternoon, 233 people had already signed up for The Rex Ride, a barbecue/party centered around an up-to 60-mile, low-key ride on the Jedediah Smith Memorial Trail -- also known as the American River bike trail. The 32-mile, multi-use trail is used year-round by virtually everyone in Sacramento's huge cycling community, said event organizer Steve Rex, who owns Rex Cycles bike shop in Midtown. "It's huge. It's the focus of the cycling culture that's really rich here in Sacramento," said Rex, 47. A serious cycling injury last fall isn't stopping Rex and his wi