Specialized Sirrus 4.0 Features
You have places to go, people to see, and fitness goals to achieve. We get it—life moves pretty fast, so it's a good thing we made Sirrus to help you with all of it. Wherever you're heading, Sirrus will take you there. Sirrus features a super light aluminum alloy and carbon fiber construction, as well as reliable MicroSHIFT components that are built to withstand years of daily abuse on the world's pavement. Powerful hydraulic disc brakes provide reliable stopping power in any condition, and comfortable, ergonomically designed Body Geometry touchpoints are there to take the sting out of longer rides. So, as you push yourself to reach your goals, you'll feel more connected to your bike and know that you have the perfect partner with Sirrus.
At a Glance
- Carbon FACT 9 fork delivers comfort and saves nearly 3 pounds (1.2kg) over Sirrus 2.0 model.
- Through axle hub connection for positive wheel alignment and no rub Disc brakes.
- Wide range 2x10 MicroShift components for intuitive and 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 | MicroSHIFT, 10-speed |
| Front Derailleur | MicroSHIFT FD-R522, Band-clamp |
| Rear Derailleur | MicroSHIFT RD-R55S, short cage |
| Cassette | Sunrace CSRS0, 10-speed, 11-28t |
| Chain | KMC, X10, EPT anti-corrosion coating, 10-speed w/ Missing Link™ |
| Crankset | Praxis Alba M24, solid forged arms, 6061 outer ring, steel inner ring, 110 BCD, 10-speed |
| Chain Rings | 48/32T |
| Bottom Bracket | Praxis M24, BSA |
| Rims | 700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h |
| 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 |
| Spokes | Stainless, 14g |
| Front Tire | RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c |
| Rear Tire | RoadSport Reflect, Wire bead, Blackbelt/Endurant Casing, 700x32c |
| Inner Tubes | Standard 40mm SV 700x32-50 |
| Front Brake | Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 160mm |
| Rear Brake | Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 140mm |
| Stem | Future Stem, Comp |
| Handlebars | Double-butted alloy, 9-degree backsweep, 31.8mm |
| Saddle | Body Geometry Power Sport, steel rails |
| Seatpost | Alloy, 2-bolt, 14mm offset, 27.2mm |
Specialized Sirrus 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: Specialized Sirrus 4.0
