2021 Specialized Sirrus X 4.0
A 700c aluminum frame fitness bike with upper mid-range components and hydraulic disc brakes, priced near the middle of the Sirrus model range. Compare the full range
| MSRP | $1,500 |
|---|---|
| Suspension | Hardtail |
| Travel | 20mm front |
| Frame | Aluminum |
| Fork | Carbon |
| Wheels | 700c |
| Drivetrain | 1 × 11 |
| Groupset | Deore |
| Brakes | Hydraulic Disc |
1 × 11 — 11 speed
Sirrus X 4.0
Similar Bikes
The Sirrus X 4.0 is geared about the same as similar bikes for riding up hills.
The Sirrus X 4.0 won‘t keep up with similar bikes while riding downhill or sprinting.
Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more
May 2022
Hybrid do-it-all with a bit of edge and attitude, just as happy around town as it is on the byways
March 2020
Smooth, fast, and utilitarian—this commuter has it all.
September 2019
A fuss-free commuter with a commanding ride position and a nicely understated style
| 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 BB Standard: BSA, 68mm, threaded Colors: Gloss Sky Blue / Tarmac Black / Satin Black Reflective; Gloss Smoke / Cool Grey / Satin Black Reflective |
|---|---|
| Fork | Carbon Monocoque, 12x100mm flat thru-axle, flat mount disc, Future Shock 1.5 |
| Bottom Bracket | Threaded BSA 68mm, 24mm spindle |
| Stem | Future Stem, Comp |
| Handlebar | Specialized, alloy, 9-degree backsweep, 15mm rise, 31.8mm |
| Saddle | Bridge Comp, Hollow Cr-mo rails, 155/143mm |
| Seatpost | Alloy, 2-bolt, 14mm offset, 27.2mm |
| Pedals | Specialized Body Geometry Fitness, platform, plastic |
| Rear Derailleur | Shimano Deore M5100, SGS, 11-speed |
|---|---|
| Crank | Forged aluminum arms, 2-piece, 24mm spindle, Narrow-wide Aluminum chainring, 40T |
| Shifters | Shimano Deore M5100, 11-speed |
| Cassette | Shimano Deore M5100, 11-speed, 11-42t |
| Chain | KMC X11, 11-speed w/ Missing Link™ |
| Brakes | Shimano BR-MT200, hydraulic disc, 160mm |
| Rims | 700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h |
|---|---|
| Spokes | Stainless, 14g |
| Front Hub | Alloy, Center Lock disc, high-low flange, sealed cartridge bearings, 12x100mm spacing, 24H |
| Rear Hub | Alloy, Center Lock disc, high-low flange, sealed cartridge bearings, 12x142mm spacing, 28H |
| Tires | Front: Pathfinder Sport, 700x38mm, Rear: Pathfinder Sport, 700x38mm |