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Sirrus X 4.0

2021 Sirrus X 4.0

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.

Technical Specifications

DRIVETRAIN

Chainrings

40T

Shift Levers

Shimano Deore M5100, 11-speed

Crankset

Forged aluminum arms, 2-piece, 24mm spindle, Narrow-wide Aluminum chainring

Rear Derailleur

Shimano Deore M5100, SGS, 11-speed

Cassette

Shimano Deore M5100, 11-speed, 11-42t

Bottom Bracket

Threaded BSA 68mm, 24mm spindle

Chain

KMC X11, 11-speed w/ Missing Link™

WHEELS & TIRES

Inner Tubes

Presta, 48mm valve

Rear Hub

Alloy, Center Lock disc, high-low flange, sealed cartridge bearings, 12x142mm spacing, 28H

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

Front Tire

Pathfinder Sport, 700x38mm

Rear Tire

Pathfinder Sport, 700x38mm

ACCESSORIES

Pedals

Specialized Body Geometry Fitness, platform, plastic

BRAKES

Rear Brake

Shimano BR-MT200, hydraulic disc, 160mm

Front Brake

Shimano BR-MT200, hydraulic disc, 160mm

COCKPIT

Handlebars

Specialized, alloy, 9-degree backsweep, 15mm rise, 31.8mm

SeatPost

Alloy, 2-bolt, 14mm offset, 27.2mm

Saddle

Bridge Comp, Hollow Cr-mo rails, 155/143mm

Seat Binder

Bolt-type, 31.8mm

Tape

Specialized Neutralizer, Body Geometry, locking grip

Stem

Future Stem, Comp

FRAMESET

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

WHEELS

Spokes

Stainless, 14g

Suspension

Fork

Carbon Monocoque, 12x100mm flat thru-axle, flat mount disc, Future Shock 1.5

* Weights based on production painted frames as pictured. Actual weights will vary based on colorway, frame size, and component variation. Specifications are subject to change without notice.

Geometry

XXSXSSMLXL
Crank Length165mm165mm170mm170mm175mm175mm
Handlebar Width660mm660mm660mm680mm680mm680mm
Stem Length60mm60mm70mm80mm90mm100mm
Saddle Width155mm155mm155mm143mm143mm143mm
Seatpost Length300mm300mm350mm350mm400mm400mm
Stack587mm590mm606mm635mm651mm672mm
Reach355mm371mm376mm382mm386mm398mm
Head-Tube Length111mm125mm143mm169mm186mm208mm
Head-Tube Angle69.5°70°70°71°71°71°
B-B Height284mm284mm284mm284mm284mm284mm
B-B Drop70mm70mm70mm70mm70mm70mm
Trail78mm75mm75mm68mm68mm68mm
Fork Length (full)395mm395mm395mm395mm395mm395mm
Fork Rake/Offset51mm51mm51mm51mm51mm51mm
Front-Center602mm618mm629mm634mm644mm663mm
Chain-Stay Length440mm440mm440mm440mm440mm440mm
Wheelbase1033mm1049mm1060mm1065mm1074mm1093mm
Top-Tube Length (horizontal)529mm549mm559mm573mm581mm599mm
Bike Stand-Over Height700mm722mm750mm778mm810mm831mm
Seat-Tube Length360mm395mm440mm470mm510mm530mm
Seat-Tube Angle73.5°73.5°73.5°73.5°73.5°73.5°
Geometry

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