Specialized Sirrus : ROLL 3.0 Bike FOR SALE Lightweight Alloy Frame Eight Gear Speeds Stable and wide 650b tires Hydraulic Disc Brakes Wheels approx. 26" Made of A1 Premium Aluminum feat.. Ground Control Positioning W/ Rack/Fender Mounts Wide Diameter, 650b x 2.3" Nimbus II Sport Reflective Ac...