The Marin Presidio 3 is the commuter bike of your dreams, because why shouldn't your daily driver also be a sports car? We've built a fast, fun and exciting commuter with a lightweight Series 2 aluminum frame and straight-blade fork. We've also added heaps of reliability and "woah, that's cool!" with a Gates Carbon Drive 8-speed belt-driven drivetrain and internally-geared Shimano Nexus rear hub. Shimano hydraulic disc brakes, Vee Tire tires and plenty of reliable Marin components complete the package. Lightweight Aluminum Frames Presidio frames are constructed of lightweight 6061 aluminum tubing with rack and fender mounts. Series 2 tubing on the Presidio 3 and 2 models add internal cable routing, and belt drive compatible forged slider dropouts for internally geared hubs. Marin Slider Dropouts Our new slider dropouts were created specifically to bring the best technologies for commute bikes into a clean and tidy package. The dropouts slide to tension belts and chains, while incorporating flat mount disc brakes, and a direct mount rear kickstand to support the bike where weight is centered with gear. DISC Brakes Hydraulic disc brakes provide smooth, controlled stopping in all conditions with minimal maintenance. Internally Geared HUBS Internally geared hubs on the Presidio 3 and 2 package the gearing into a compact, maintenance-free package.

Description from The Bike Connection.