Sirrus 4.0

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. Sirrus features a super light aluminum alloy and carbon fiber construction, as well as reliable MicroSHIFT components that are built to withstand years of daily abuse on the world's pavement. Powerful hydraulic disc brakes provide reliable stopping power in any condition, and comfortable, ergonomically designed Body Geometry touchpoints are there to take the sting out of longer rides. So, as you push yourself to reach your goals, you'll feel more connected to your bike and know that you have the perfect partner with Sirrus.

Technical Specifications

Frameset

Frame

Specialized A1 SL Premium Aluminum, Fitness Geometry, fully manipulated butted tubing, internal cable routing, flat-mount disc, 12x142mm thru-axle, Plug + Play rack/fender mounts

Suspension

Fork

Specialized FACT 9r Carbon Monocoque, flat-mount disc, 12x100mm thru-axle, low rider mounts, Plug + Play fender mounts, Future Shock 1.5

Cockpit

Handlebars

Double-butted alloy, 9-degree backsweep, 31.8mm

Saddle

Body Geometry Power Sport, steel rails

Stem

Future Stem, Comp

Tape

Specialized Body Geometry Contour, lock-on

SeatPost

Alloy, 2-bolt, 14mm offset, 27.2mm

Seat Binder

Bolt-type, 31.8mm

Brakes

Rear Brake

Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 140mm

Front Brake

Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 160mm

Drivetrain

Shift Levers

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, 10-speed w/ Missing Link™

Crankset

Praxis Alba M24, solid forged arms, 6061 outer ring, steel inner ring, 110 BCD, 10-speed

Chainrings

48/32T

Bottom Bracket

Praxis M24, BSA

Wheels & Tires

Front Hub

Alloy, 6-bolt disc, sealed cartridge bearing, high-low flange, 12x100mm thru-axle, 28h

Rims

700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h

Rear Hub

Alloy, 6-bolt disc, sealed cartridge bearings, high-low flange, 12x142mm thru-axle, 28h

Spokes

Stainless, 14g

Front Tire

RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c

Rear Tire

RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c

Inner Tubes

700x28/38mm, 48mm Presta valve

Accessories

Pedals

Specialized Body Geometry Fitness, platform, plastic

* Weights based on production painted frames as pictured. Actual weights will vary based on colourway, frame size, and component variation. Specifications are subject to change without notice.

Geometry

	XXS	XS	S	M	L	XL
Crank Length	165mm	165mm	170mm	172.5mm	172.5mm	175mm
Handlebar Width	580mm	580mm	600mm	600mm	620mm	620mm
Stem Length	60mm	70mm	70mm	80mm	90mm	100mm
Saddle Width	155mm	155mm	155mm	143mm	143mm	143mm
Seatpost Length	300mm	300mm	350mm	350mm	400mm	400mm
Stack	587mm	590mm	606mm	635mm	651mm	672mm
Reach	355mm	371mm	376mm	382mm	386mm	398mm
Head-Tube Length	111mm	125mm	143mm	169mm	186mm	208mm
Head-Tube Angle	69.5°	70°	71°	71°	71°	70°
B-B Height	284mm	284mm	284mm	284mm	284mm	284mm
B-B Drop	70mm	70mm	70mm	70mm	70mm	70mm
Trail	78mm	75mm	75mm	68mm	68mm	68mm
Fork Length (full)	395mm	395mm	395mm	395mm	395mm	395mm
Fork Rake/Offset	51mm	51mm	51mm	51mm	51mm	51mm
Front-Center	602mm	618mm	629mm	634mm	644mm	663mm
Chain-Stay Length	440mm	440mm	440mm	440mm	440mm	440mm
Wheelbase	1033mm	1049mm	1060mm	1065mm	1074mm	1093mm
Top-Tube Length (horizontal)	529mm	549mm	559mm	573mm	581mm	599mm
Bike Stand-Over Height	722mm	750mm	778mm	810mm	831mm	700mm
Seat-Tube Length	360mm	395mm	440mm	470mm	510mm	530mm
Seat-Tube Angle	73.5°	73.5°	73.5°	73.5°	73.5°	73.5°