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) lighter than our Crosstrail Hydro model.
- Maximum control through intuitive shifting with 1x7 wide range gearing, and powerful hydraulic disc brakes.
- Float over rough terrain with fast rolling Specialized Pathfinder 42c tires featuring proprietary Gripton rubber compound.
Component Specifications
| Frame | Specialized A1 Premium Aluminum, Fitness Geometry, butted tubing, internal cable routing, flat-mount disc, quick-release, Plug + Play rack/fender mounts |
| Seat Binder | Bolt-type, 31.8mm |
| Fork | Hi-Ten steel, flat-mount disc, Plug + Play fender mounts, low rider rack mounts, quick-release |
| Shift Levers | Shimano Altus SL-M315-7R, 7-Speed |
| Rear Derailleur | Shimano Acera, 8-speed |
| Cassette | microSHIFT CS-H074, 12-40t, 7-Speed |
| Chain | KMC X8 w/ Missing Link™ |
| Crankset | Prowheel Alloy, XXS - XS: 165mm, S - M: 170mm, L - XL: 175mm |
| Chain Rings | Narrow Wide Steel 42T |
| Bottom Bracket | Square-tapered, 68mm |
| Rims | 700C disc brake, double-wall alloy, 22mm depth, 21mm internal width |
| Front Hub | Alloy, 6-bolt disc, loose ball bearing, quick-release, 32h |
| Rear Hub | Alloy, 6-bolt disc, 8/9-Speed freehub, loose ball bearing, quick-release, 36h, 10x135mm |
| Spokes | Stainless, 14g |
| Front Tire | Pathfinder Wirebead Fast Gravel 700X40C |
| Rear Tire | Pathfinder Wirebead Fast Gravel 700X40C |
| Inner Tubes | Standard 40mm SV 700x32-50 |
| Front Brake | Lee Chi, Mechanical Disc |
| Rear Brake | Lee Chi, Mechanical Disc |
| Stem | 3D-forged alloy, 31.8mm, 7-degree rise |
| Handlebars | Specialized, alloy, 15-degree backsweep, 46mm rise, 31.8mm |
| Saddle | Bridge Sport, Steel rails, 155/143mm |
| Seatpost | Alloy, 12mm offset, 2-bolt clamp, 27.2mm |
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 |
Size Guide: 2026 Specialized Sirrus X 1.0 Step-Through
