Author Opus

2017 MountainCross-country Manufacturer page

Fork travel: 80 mm
Wheels: 26″
Gear range: 350%
Weight: 15.3 kg 33.7 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Rim brake

Rider height by size (cm)

Size guide

17" 155–172
19" 170–185
21" 182–200

Components

13 of 20 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

alloy 6061 26" Not identified

Suspension

1 part

Fork
- RST

Drivetrain

6 parts

Cassette
- Shimano MF-TZ21
MF-TZ21
Chain
- KMC
Crankset
- Prowheel
Front derailleur
- Shimano Tourney FD-TY500
FD-TY500
Rear derailleur
- Shimano Tourney RD-TY300 7 speeds
RD-TY300
Shifters
- Shimano

Brakes

1 part

Brakes
- Tektro

Wheels and tires

5 parts

Front hub

QUANDO 32 holes Not identified
Rear hub

QUANDO 32 holes Not identified
Rims

alloy 32 holes Not identified
Spokes

steel Not identified
Tires
- CST

Cockpit and contact points

6 parts

Grips
- Author
Handlebar

steel 42 mm 620 / 640 mm Not identified
Pedals

resin Not identified
Saddle
- Author
Seatpost
- Zoom
Stem
- Zoom

Sizes and geometry

3 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 19"

Table

Geometry diagram unavailable

The drawing needs reach and stack, which the manufacturer did not publish. Available facts remain in the table.

Size Reported by the manufacturer

Complete manufacturer geometry table 3 published sizes

Complete manufacturer geometry by size
Measurement
Top tube lengthmm	550	560	570
Seat tube lengthmm	432	483	533
Head tube lengthmm	150	160	170
Head tube angle	71°	71°	71°
Seat tube angle	75°	75°	75°
Chainstay lengthmm	430	430	430
Wheelbasemm	1049	1060	1070
Front centermm	623	634	644
Bottom bracket dropmm	45	45	45
Bottom bracket heightmm	298	298	298
Fork rakemm	38	38	38

Not published by the manufacturer: Reach, Stack, Standover height, Trail, Stack/reach ratio, 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: 15.3 kg

33.7 lb

Suspension

Suspension configuration: Hardtail
Front travel: 80 mm

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 24
Largest chainring: 42
Smallest sprocket: 14
Largest sprocket: 28
Lowest gear: 22.3 in
Highest gear: 78.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: suspension
Shifting: Mechanical

Additional specifications

Fork spring: Coil
Tire width: 2″
Wheel material: Aluminum
Wheel size: 26″

Technical analysis

3 measures

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

Front travel

80 mm

This value is below the central range for this class.

Cohort: Mountain / Cross-country Model year: 2017
Sample: 555 bicycles with this information
Coverage: 87.8% of the class

Lowest gear

22.3 gear inches

This value is above the central range for this class.

Cohort: Mountain / Cross-country Model year: 2017
Sample: 607 bicycles with this information
Coverage: 96.0% of the class

Highest gear

78.0 gear inches

This value is below the central range for this class.

Cohort: Mountain / Cross-country Model year: 2017
Sample: 607 bicycles with this information
Coverage: 96.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.5 km/h
Highest gear: 29.9 km/h

Total gear range 350%

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: 22.3–78.0 gear inches
Class reference (p10–p90): 17.0–110.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2017
Lowest gear: 607 bicycles with this information, 96.0% of the class
Highest gear: 607 bicycles with this information, 96.0% of the class