VelopediaBicycle Archive · Specification report

2021 Specialized Sirrus X 4.0

Velopedia Archive ID 900004309

Overview

Model year2021
BrandSpecialized
ModelSirrus X 4.0
Bicycle typeHybrid
Archive ID900004309
Original MSRP$1,500.00
ColorsGloss Sky Blue / Tarmac Black / Satin Black Reflective; Gloss Smoke / Cool Grey / Satin Black Reflective
SizesXXS; XS; S; M; L; XL

Frameset

Frame constructionSpecialized A1 SL Premium Aluminum, Fitness Geometry, fully manipulated butted tubing, internal cable routing, flat-mount disc, 12x142mm thru-axle, Plug + Play rack/fender mounts
Frame materialAluminum
ForkCarbon Monocoque, 12x100mm flat thru-axle, flat mount disc, Future Shock 1.5
Fork materialCarbon Fiber

Drivetrain

ShiftersShimano Deore M5100, 11-speed
Rear derailleurShimano Deore M5100, SGS, 11-speed
CranksetForged aluminum arms, 2-piece, 24mm spindle, Narrow-wide Aluminum chainring; chainrings: 40T
Bottom bracketThreaded BSA 68mm, 24mm spindle
BB shell width68 mm
CassetteShimano Deore M5100, 11-speed, 11-42t
ChainKMC X11, 11-speed w/ Missing Link™
PedalsSpecialized Body Geometry Fitness, platform, plastic

Brakes

Brakes(F) Shimano BR-MT200, hydraulic disc, 160mm / (R) Shimano BR-MT200, hydraulic disc, 160mm

Cockpit & contact points

HandlebarSpecialized, alloy, 9-degree backsweep, 15mm rise, 31.8mm
StemFuture Stem, Comp
SaddleBridge Comp, Hollow Cr-mo rails, 155/143mm
SeatpostAlloy, 2-bolt, 14mm offset, 27.2mm

Wheels & tires

Hubs(F) Alloy, Center Lock disc, high-low flange, sealed cartridge bearings, 12x100mm spacing, 24H / (R) Alloy, Center Lock disc, high-low flange, sealed cartridge bearings, 12x142mm spacing, 28H
Rims700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h
SpokesStainless, 14g
Front tirePathfinder Sport, 700x38mm
Rear tirePathfinder Sport, 700x38mm

Geometry · XXS

Seat tube360 mm
Effective top tube529 mm
Head tube111 mm
Head-tube angle69.5°
Seat-tube angle73.5°
Chainstay / rear center440 mm
Wheelbase1033 mm
Bottom-bracket drop70 mm
Bottom-bracket height284 mm
Reach355 mm
Stack587 mm
Standover height700 mm
Fork offset / rake51 mm
Front center602 mm
Trail78 mm
Fork length / axle-to-crown395 mm

Geometry · XS

Seat tube395 mm
Effective top tube549 mm
Head tube125 mm
Head-tube angle70°
Seat-tube angle73.5°
Chainstay / rear center440 mm
Wheelbase1049 mm
Bottom-bracket drop70 mm
Bottom-bracket height284 mm
Reach371 mm
Stack590 mm
Standover height722 mm
Fork offset / rake51 mm
Front center618 mm
Trail75 mm
Fork length / axle-to-crown395 mm

Geometry · S

Seat tube440 mm
Effective top tube559 mm
Head tube143 mm
Head-tube angle70°
Seat-tube angle73.5°
Chainstay / rear center440 mm
Wheelbase1060 mm
Bottom-bracket drop70 mm
Bottom-bracket height284 mm
Reach376 mm
Stack606 mm
Standover height750 mm
Fork offset / rake51 mm
Front center629 mm
Trail75 mm
Fork length / axle-to-crown395 mm

Geometry · M

Seat tube470 mm
Effective top tube573 mm
Head tube169 mm
Head-tube angle71°
Seat-tube angle73.5°
Chainstay / rear center440 mm
Wheelbase1065 mm
Bottom-bracket drop70 mm
Bottom-bracket height284 mm
Reach382 mm
Stack635 mm
Standover height778 mm
Fork offset / rake51 mm
Front center634 mm
Trail68 mm
Fork length / axle-to-crown395 mm

Geometry · L

Seat tube510 mm
Effective top tube581 mm
Head tube186 mm
Head-tube angle71°
Seat-tube angle73.5°
Chainstay / rear center440 mm
Wheelbase1074 mm
Bottom-bracket drop70 mm
Bottom-bracket height284 mm
Reach386 mm
Stack651 mm
Standover height810 mm
Fork offset / rake51 mm
Front center644 mm
Trail68 mm
Fork length / axle-to-crown395 mm

Geometry · XL

Seat tube530 mm
Effective top tube599 mm
Head tube208 mm
Head-tube angle71°
Seat-tube angle73.5°
Chainstay / rear center440 mm
Wheelbase1093 mm
Bottom-bracket drop70 mm
Bottom-bracket height284 mm
Reach398 mm
Stack672 mm
Standover height831 mm
Fork offset / rake51 mm
Front center663 mm
Trail68 mm
Fork length / axle-to-crown395 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 27, 2026.