2025 Specialized Sirrus X 4.0 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
- Future Shock 1.5 delivers 20mm of compliance to give maximum comfort and control over the rough stuff.
- Added Carbon Fork and an A1 SL alloy frame delivers a build 1.6lb (.8kg) lighter than the 3.0 model–no heavy hybrid featuring a mountain style suspension fork comes close.
- Wide-range 1x11 Shimano CUES shifting delivers precise shifting.
Component Specifications
| 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 |
| Seat Binder | Bolt-type, 31.8mm |
| Fork | Specialized FACT 9r Carbon Monocoque, flat-mount disc, 12x100mm thru-axle, low rider mounts, Plug + Play fender mounts, Future Shock 1.5 |
| Shift Levers | Shimano Cues SL-U6000, 11-Speed |
| Rear Derailleur | Shimano Cues Shadow RD-U6000, 11-Speed |
| Cassette | Shimano, CS-LG400-11, Cues, 11-Speed, 11-50T |
| Chain | KMC eGlide for 11-Speed Cues |
| Crankset | PROWHEEL, Alloy, 165mm |
| Chain Rings | 42T |
| Bottom Bracket | Threaded BSA 68mm, 24mm spindle |
| Rims | 700C disc, double-wall alloy, 22mm depth, 21mm internal width |
| Front Hub | Alloy, Center lock Disc, High-Low Flange, Sealed Cartridge Bearing, 24H, 12mm Axle, 100mm Spacing |
| Rear Hub | Alloy, Center lock Disc, High-Low Flange, Sealed Cartridge Bearing, 32H, 12mm Axle, 142mm Spacing |
| Spokes | Stainless, 14g |
| Front Tire | Pathfinder Sport, 700x38 |
| Rear Tire | Pathfinder Sport, 700x38 |
| Inner Tubes | Standard 40mm SV 700x32-50 |
| Front Brake | Tektro HD-R510, hydraulic disc, 160mm |
| Rear Brake | Tektro HD-R510, hydraulic disc, 160mm |
| Stem | Future Stem, Comp |
| Handlebars | Alloy Mini Rise, 9-degree backsweep, 15mm rise, 31.8mm |
| Saddle | Body Geometry Power Sport, steel rails |
| Seatpost | Alloy, 2-bolt, 14mm offset, 27.2mm |
2025 Specialized Sirrus X 4.0
| Bike/Frame Size | XXS | XS | S | M | L | XL |
|---|---|---|---|---|---|---|
| Stack | 587 mm | 590 mm | 606 mm | 635 mm | 651 mm | 672 mm |
| Reach | 355 mm | 371 mm | 376 mm | 382 mm | 386 mm | 398 mm |
| Chain-Stay Length | 440 mm | 440 mm | 440 mm | 440 mm | 440 mm | 440 mm |
| Wheelbase | 1033 mm | 1049 mm | 1060 mm | 1065 mm | 1074 mm | 1093 mm |
| Top-Tube Length (horizontal) | 529 mm | 549 mm | 559 mm | 573 mm | 581 mm | 599 mm |
| Bike Stand-Over Height | 700 mm | 722 mm | 750 mm | 778 mm | 810 mm | 831 mm |
| Seat-Tube Length | 360 mm | 395 mm | 440 mm | 470 mm | 510 mm | 530 mm |
| Seat-Tube Angle | 73.5° | 73.5° | 73.5° | 73.5° | 73.5° | 73.5° |
| Head-Tube Length | 111 mm | 125 mm | 143 mm | 169 mm | 186 mm | 208 mm |
| Head-Tube Angle | 69.5° | 70° | 70° | 71° | 71° | 71° |
| B-B Height | 284 mm | 284 mm | 284 mm | 284 mm | 284 mm | 284 mm |
| B-B Drop | 70 mm | 70 mm | 70 mm | 70 mm | 70 mm | 70 mm |
| Trail | 78 mm | 75 mm | 75 mm | 68 mm | 68 mm | 68 mm |
| Fork Length (full) | 395 mm | 395 mm | 395 mm | 395 mm | 395 mm | 395 mm |
| Fork Rake/Offset | 51 mm | 51 mm | 51 mm | 51 mm | 51 mm | 51 mm |
| Front-Center | 602 mm | 618 mm | 629 mm | 634 mm | 644 mm | 663 mm |
Size Guide: 2025 Specialized Sirrus X 4.0
