Marin Alcatraz 24"We've taken the Alcatraz 1 and scaled it down for smaller riders. Built upon the same tubing as the larger models, it features a 360mm reach, 69 headtube angle, and 72 seattube angle, with 369mm chainstays. A suspension corrected rigid CrMo fork is designed to handle rough and rowdy riding, and a simple and stout single speed drivetrain and Tektro mechanical disc brakes ensure a fun and safe ride. Specifications Frame Series 3 6061 Aluminum, 24