2026 Specialized Sirrus X 1.0 Step-Through Features
Offering an unprecedented combination of comfort, efficiency, and nimble handling, the Sirrus X excels on pavement, dirt, and any terrain in between.
SMOOTH; COMFORTABLE, AND EFFICIENT: Sirrus X provides the smoothest ride in its class. With bigger, confidence-inspiring tires, a slightly more upright riding position, and a super intuitive one-by drivetrain. RIDER-FIRST ENGINEERED: Like all Specialized performance bikes, the geometry of each frame is uniquely crafted. This means that for every frame, each tube size is specifically selected to achieve the optimal balance of rigidity, weight, and responsiveness to ensure that no matter what size you’re riding, you will experience the world’s best ride.
NIMBLE: Class-leading light-weight, exceptional pedaling efficiency, and steering precision merge for confident, nearly telepathic handling characteristics.
At a Glance
- Lightweight A1 Alloy frame with clean internal cable routing, 3.5lbs (1.7kg).
- Maximum control through intuitive shifting with 1x7 wide range gearing.
- Float over rough terrain with fast rolling Specialized Pathfinder 42c tires featuring proprietary Gripton rubber compound.
Component Specifications
| Frameset |
frame
seat binder
|
| Suspension |
fork
|
| Brakes |
front brake
rear brake
|
| Drivetrain |
shift levers
rear derailleur
cassette
chain
crankset
chain rings
bottom bracket
|
| Wheels & Tires |
rims
front hub
rear hub
spokes
front tire
rear tire
inner tubes
|
| Cockpit |
stem
handlebars
saddle
seatpost
pedals
|
2026 Specialized Sirrus X 1.0 Step-Through
| Bike/Frame Size | XS | S | M |
|---|---|---|---|
| Stack | 555 mm | 563 mm | 593 mm |
| Reach | 393 mm | 400 mm | 408 mm |
| Chain-Stay Length | 440 mm | 440 mm | 440 mm |
| Wheelbase | 1058 mm | 1068 mm | 1077 mm |
| Top-Tube Length (horizontal) | 557 mm | 567 mm | 584 mm |
| Bike Stand-Over Height | 636 mm | 636 mm | 641 mm |
| Seat-Tube Length | 395 mm | 450 mm | 500 mm |
| Seat-Tube Angle | 73.5° | 73.5° | 73.5° |
| Head-Tube Length | 139 mm | 147 mm | 175 mm |
| Head-Tube Angle | 70° | 70° | 71° |
| B-B Height | 288 mm | 288 mm | 288 mm |
| B-B Drop | 70 mm | 70 mm | 70 mm |
| Trail | 76 mm | 76 mm | 69 mm |
| Fork Length (full) | 395 mm | 395 mm | 395 mm |
| Fork Rake/Offset | 51 mm | 51 mm | 51 mm |
| Front-Center | 628 mm | 637 mm | 646 mm |
Component Geometry
| Component | XS | S | M |
|---|---|---|---|
| Crank Length | 165 mm | 165 mm | 170 mm |
| Handlebar Width | 660 mm | 660 mm | 660 mm |
| Stem Length | 70 mm | 70 mm | 80 mm |
| Saddle Width | 155 mm | 155 mm | 143 mm |
| Seatpost Length | 300 mm | 300 mm | 350 mm |
Size Guide: 2026 Specialized Sirrus X 1.0 Step-Through
