Product Info
Details + Specs
Sirrus 4.0
Versatility for every day
You have places to go, people to see, and fitness goals to achieve. We get it — life moves pretty fast, so it's a good thing we made Sirrus to help you with all of it. Wherever you're heading, Sirrus will take you there.
Best for: Fitness, commuting and versatile riding across pavement and light gravel.
At a glance
Frame
Specialized A1 SL Premium Aluminum, Fitness Geometry, fully manipulated…
Drivetrain
MicroSHIFT RD-R55S, short cage
Cockpit
Double-butted alloy, 9-degree backsweep, 31.8mm
Fork
Specialized FACT 9r Carbon Monocoque, Future Shock 1.5, 20mm travel
Brakes
Tektro HD-R280, hydraulic disc, 160mm front / 140mm rear
Shifters
MicroSHIFT, 10-speed
Key highlights
Specialized A1 SL Premium Aluminum with a FACT 9r Carbon Monocoque fork saves weight while keeping the ride smooth.
20mm of headtube-integrated travel takes the edge off rough pavement without the weight of a suspension fork.
48/32T chainrings and an 11-28t cassette give a genuine gear range for climbs and flat-out cruising alike.
Tektro HD-R280 stoppers front and rear for reliable, all-weather braking power.
Complete specification
Full build details
Components are grouped by bike system so the complete build is easy to scan.
Frameset
Frame
Specialized A1 SL Premium Aluminum, Fitness Geometry, fully manipulated butted tubing, internal cable routing
Suspension
Fork
Specialized FACT 9r Carbon Monocoque, Future Shock 1.5, 20mm travel
Brakes
Brakes
Tektro HD-R280, hydraulic disc, 160mm front / 140mm rear
Drivetrain
Shifters
MicroSHIFT, 10-speed
Front Derailleur
MicroSHIFT FD-R522, band-clamp
Rear Derailleur
MicroSHIFT RD-R55S, short cage
Cassette
Sunrace CSRS0, 10-speed, 11-28t
Chain
KMC X10, EPT anti-corrosion coating, with Missing Link
Crankset
Praxis Alba M24, 48/32T
Bottom Bracket
Praxis M24, BSA
Wheels and tyres
Wheels
700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h; alloy hubs, sealed cartridge bearings, 6-bolt disc, thru-axle
Tyres
RoadSport Reflect, wire bead, Blackbelt/Endurant casing, 700x32c (front and rear)
Cockpit and contact points
Handlebars
Double-butted alloy, 9-degree backsweep, 31.8mm
Stem
Future Stem, Comp
Seatpost
Alloy, 2-bolt, 14mm offset, 27.2mm
Saddle
Body Geometry Power Sport, steel rails
Component specifications are subject to change without notice.
Frequently bought with