Sirrus 4.0
OverviewAbout the Specialized Sirrus 4.0
The Specialized Sirrus 4.0 is a hybrid bike, built on a aluminium frame, listed at $2,250. A flat-bar bike for fitness, commuting and easy weekend riding.
SizingWhat size Sirrus 4.0 do I need?
Enter your height to see the size we would start with.
| Size | Rider height | In feet |
|---|---|---|
| XS | 145 to 157 cm | 4 ft 9 in to 5 ft 2 in |
| S | 155 to 167 cm | 5 ft 1 in to 5 ft 6 in |
| M | 165 to 177 cm | 5 ft 5 in to 5 ft 10 in |
| L | 177 to 188 cm | 5 ft 10 in to 6 ft 2 in |
| XL | 188 to 198 cm | 6 ft 2 in to 6 ft 6 in |
Height is a starting point: arm and leg length, flexibility and riding style all matter, so a test ride beats any chart. How bike sizing works.
SpecificationsWhat we know
- Brand
- Specialized
- Model year
- 2022
- Category
- Hybrid
- Frame
- Aluminium
- Wheel size
- 700c
- Drivetrain
- 2x10
- Brakes
- Disc
- Frame sizes
- XXS, XS, S, M, L, XL
- Price
- $2,250, RRP AUD (Specialized Australia, checked 17 Oct 2026)
Specs and pricing are listed in AUD and sourced from Australian retail listings. Confirm the current details and availability with the seller before purchase.
GeometrySize M
- Stack
- 635 mm
- Reach
- 382 mm
- Stack/reach
- 1.66
- Head angle
- 71 deg
- Seat angle
- 73.5 deg
- Wheelbase
- 1065 mm
- Chainstay
- 440 mm
- BB drop
- 70 mm
- Standover
- 810 mm
- Fork rake
- 51 mm
Drivetrain & buildFull specification
- Shifting
- Mechanical
- Drive
- 2x
- Speeds
- 10
- Crank
- Praxis Alba M24, solid forged arms, 6061 outer ring, steel inner ring, 110 BCD, 10-speed
- Cassette
- Sunrace CSRS0, 10-speed, 11-28t
- Rear derailleur
- MicroSHIFT RD-R55S, short cage
- Brakes
- Tektro HD-R280, hydraulic disc, resin pads, flat-mount, 160mm
- Wheelset
- 700C disc, double-wall alloy, 22mm depth, 21mm internal width, 32h
- Rim internal width
- 21 mm
- Stock tyre
- 700x32c
- Fork material
- Carbon
- BB standard
- Praxis M24, BSA
- Cockpit
- Future Stem, Comp / Double-butted alloy, 9-degree backsweep, 31.8mm
- Saddle
- Body Geometry Power Sport, steel rails
Bike DNAWhat the numbers say
- Position
- Stack-to-reach 1.66 gives an upright, comfort-oriented riding position.
- Steering
- A 71 deg head angle points to stable, relaxed steering.
Derived from the published geometry and gearing above. It describes the numbers, not a ride test.
BikeFinder Data Profile: geometry and specification researched from published sources (Specialized Australia product page 200225 (spec list and geometry chart)), verified 2026-10-17. This is a specification analysis, not a physical ride review.
Where to buyStockist
BikeFinder is an independent directory. We link to retailers; prices and stock are set by the seller and shown as at the date checked.
