Sirrus is a hybrid bicycle in the Specialized model lineup.

The Sirrus 4 bike model features a carbon frame, equipped with smooth tires for urban riding.

Comfortable and capable, with a slightly more upright riding position. All Sirrus bikes are equipped with a comfortable saddle, ergonomic grips, and wider pedals. The bike has dedicated mounting points for mudguards.


BIKE SPEC...
Frame: Specialized FACT 9r carbon, Fitness Geometry, 12x142mm thru-axle, internal cable routing, flat-mount disc, Plug + Play fender mounts
Fork: Specialized FACT carbon, 12x100mm thru-axle, flat-mount disc, Plug + Play fender mounts
Front Hub: Alloy, 6-bolt disc, sealed cartridge bearing, high-low flange, 12x100mm thru-axle, 28h
Rear Hub: Alloy, 6-bolt disc, sealed cartridge bearings, high-low flange, 12x142mm thru-axle, 28h
Spokes: Stainless, 14g
Rims: 700C disc, double-wall alloy, 22mm depth, 21mm internal width, 28h
Tubes: Presta, 48mm valve
Front Tire: RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c
Rear Tire: RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c
Bottom Bracket: Shimano threaded
Shifters: microSHIFT, 9-speed
Front Derailleur: microSHIFT R9, 9-speed, 31.8mm clamp
Rear Derailleur: Shimano Sora, 9-speed
Cassette: Shimano Sora, 9-speed, 11-34t
Chain: KMC X9, 9-speed w/ Missing Link™
Front Brake: Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 160mm
Rear Brake: Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 140mm
Handlebars: Double-butted alloy, 9-degree backsweep, 31.8mm
Grips: Specialized Body Geometry, lock-on, integrated bar ends, hidden 4/5mm hex key
Stem: Specialized, 3D-forged alloy, 4-bolt, 7-degree rise
Saddle: Body Geometry Power Sport, steel rails
Seatpost: Alloy, 12mm offset, 2-bolt clamp, 27.2mm
Seatpost Binder: Integrated w/ frame
Pedals: Specialized Body Geometry Fitness, platform, plastic