Modest component level carbon frame hybrid bike
View on www.specialized.com
2 × 9 — 18 speed
The 2021 Sirrus 4.0 is geared about the same as similar bikes for riding up hills.
The 2021 Sirrus 4.0 is geared about the same as similar bikes for riding downhill.
Estimated spec level of the Sirrus 4.0 compared to other hybrid bikes. 99 Spokes analyzes the build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more to estimate the overall spec level of each bike.
|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|
|Bottom Bracket||BSA for 24mm spindle|
|Stem||Specialized, 3D-forged alloy, 4-bolt, 7-degree rise|
|Handlebar||Double-butted alloy, 9-degree backsweep, 31.8mm|
|Saddle||Specialized Power, hollow steel rails, 155/143mm|
|Seatpost||Alloy, 12mm offset, 2-bolt clamp, 27.2mm|
|Pedals||Specialized Body Geometry Fitness, platform, plastic|
|Rear Derailleur||Shimano Sora, 9-speed|
|Front Derailleur||microSHIFT R9, 9-speed, 31.8mm clamp|
|Crank||2-piece, forged arms, 24mm spindle, steel chainrings w/ chainguard, 48/32T|
|Cassette||Shimano Sora, 9-speed, 11-34t|
|Chain||KMC X9, 9-speed w/ Missing Link™|
|Brakes||Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 160mm|
|Rims||700C disc, double-wall alloy, 22mm depth, 21mm internal width, 28h|
|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|
|Tires||RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c|