Devinci Blackbird Altus 9s

2021 MountainTrail

Fork travel: 120 mm
Wheels: 27.5″
Drivetrain: 1 × 9 28t / 11–40t
Gear range: 364%
Weight: 14.2 kg 31.3 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 156–166
SM 163–174
MD 171–182
LG 179–189
XL 185–195

Components

16 of 22 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Aluminum Optimum G02 Not identified

Suspension

1 part

Fork
- SR Suntour XCR32

Drivetrain

6 parts

Cassette
- SunRace 11–40t
Chain
- KMC
Chain guide

CD-04D Not identified

CD-04D
Crankset

Alloy 28T Narrow Wide Not identified
Rear derailleur
- Shimano Altus RD-M370 9 speeds
RD-M370
Shifters
- Shimano Altus SL-M2010
SL-M2010

Brakes

2 parts

Brakes
- Tektro
HD-M285
Disc rotors

Stainless 160mm Not identified

Wheels and tires

5 parts

Cockpit and contact points

7 parts

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 424mm

Stack 593mm

Wheelbase 1113mm

Head angle 68.0°

Seat angle 73.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	388	408	424	441	457
Stackmm	579	578	593	602	616
Top tube lengthmm	565	585	605	625	645
Seat tube lengthmm	380	405	430	470	500
Head tube lengthmm	100	100	115	125	140
Head tube angle	68°	68°	68°	68°	68°
Seat tube angle	73°	73°	73°	73°	73°
Chainstay lengthmm	418	418	418	418	418
Wheelbasemm	1072	1092	1113	1134	1156
Front centermm	655	675	696	717	739
Bottom bracket dropmm	27	27	27	27	27
Bottom bracket heightmm	328	328	328	328	328
Standover heightmm	690	698	711	735	750
Fork rakemm	41	41	40	40	41
Trailmm	99	99	100	100	99
Stack/reach ratio	1.49	1.42	1.40	1.37	1.35

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Bicycle weight: 14.2 kg

31.3 lb

Suspension

Suspension configuration: Hardtail
Front travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 28
Largest chainring: 28
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 40
Lowest gear: 19.3 in
Highest gear: 70.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 2.4″
Wheel material: Aluminum
Wheel size: 27.5″

Technical analysis

4 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

120 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,325 bicycles with this information
Coverage: 98.1% of the class

Lowest gear

19.3 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,138 bicycles with this information
Coverage: 84.2% of the class

Highest gear

70.0 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,138 bicycles with this information
Coverage: 84.2% of the class

Shifting

Mechanical

53 of 1,347 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,347 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.4 km/h
Highest gear: 26.8 km/h

Total gear range 364%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 19.3–70.0 gear inches
Class reference (p10–p90): 16.9–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2021
Lowest gear: 1138 bicycles with this information, 84.2% of the class
Highest gear: 1138 bicycles with this information, 84.2% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2021 builds

Differences across 2021 builds
Specification	This bicycle Devinci Blackbird Altus 9s	Devinci Blackbird Altus 8s	Devinci Blackbird Deore 10s
Frame
Bicycle weight	14.2 kg	14.52 kg	15.14 kg
Drivetrain
Rear sprockets	9	8	10
Largest sprocket	40	40	46
Lowest gear	19.3 in	19.3 in	16.7 in
Brakes
Brake type	Hydraulic disc	Mechanical disc	Hydraulic disc
Other specifications
Fork spring	Not informed	Coil	Coil