Specialized Sirrus X 4.0 2021 - Hybrid Sports Bike
Sirrus X is your ticket to riding more, and to places you never imagined possible. It’s a comfortable, capable, “let’s do stuff” kind of bike that will inspire you to ride more than you ever have before. With bigger, confidence inspiring tires, a slightly more upright riding position, a super intuitive one-by drivetrain, and plenty of mounts for racks and fenders —it’s more than just a solid partner on pavement. Sirrus X is a dialed option when it’s time to hit some gravel. We’ve also equipped every Sirrus X with next-level comfort from our scientifically tested and ergonomically engineered Shared Platform Body Geometry saddle, handgrips, and pedals. We equipped Sirrus X 4.0 with the revolutionary Future Shock to take the sting out of bumps and potholes. Here’s to your life on two wheels.
- 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 Deore shifting delivers precise shifting for the long haul.
Occasionally, without notice, manufacturers change product design and/or 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 |
Fork | Carbon Monocoque, 12x100mm flat thru-axle, flat mount disc, Future Shock 1.5 |
Stem | Future Stem, Comp |
Bars | Stout Mini Rise, alloy, 9-degree backsweep, 15mm rise, 31.8mm |
Front Brake | Shimano BR-MT200, hydraulic disc, 160mm |
Rear Brake | Shimano BR-MT200, hydraulic disc, 160mm |
Rear Mech | Shimano Deore M5100, SGS, 11-speed |
Shifters | Shimano Deore M5100, 11-speed |
Speed | 11 |
Rims | 700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h |
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 |
Spokes | Stainless, 14g |
Front Tyre | Pathfinder Sport, 700x38mm |
Rear Tyre | Pathfinder Sport, 700x38mm |
Seat Post | Alloy, 2-bolt, 14mm offset, 27.2mm |
Saddle | Bridge Comp, Hollow Cr-mo rails, 155/143mm |
Chainset | Forged aluminum arms, 2-piece, 24mm spindle, Narrow-wide Aluminum chainring, 40T |
Bottom Bracket | Threaded BSA 68mm |
Chain | KMC X11, 11-speed w/ Missing Link™ |
Cassette | Shimano Deore M5100, 11-speed, 11-42t |
Pedals | Specialized Body Geometry Fitness, platform, plastic |
Specialized Sirrus X 2021 Size Chart
Frame Size | Height (cm) | Height (in) |
XXS | 142 - 150 | 4' 8" - 4' 11" |
XS | 150 - 158 | 4' 11" - 5' 2" |
S | 155 - 165 | 5' 1" - 5' 5" |
M | 165 - 175 | 5' 5" - 5' 9" |
L | 175 - 183 | 5' 9" - 6' 0" |
XL | 183 - 193 | 6' 0" - 6' 4" |
XXL | 193 - 198 | 6' 4" - 6' 6" |
What size frame do I need if I am between sizes? - read here
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