Author Elevation 27.5 ASL

2025 MountainTrail Electric bicycle Manufacturer page

Fork travel: 120 mm
Wheels: 27.5″
Gear range: 455%
Battery: 630 Wh
Weight: 23.4 kg 51.6 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

17" 158–172
19" 169–184

Components

17 of 23 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

double butted hydroformed alloy 6061 27.5" (integrated battery) Not identified

Electric system

3 parts

Battery
- Shimano BT-EN806
BT-EN806
Display
- Shimano SC-EN610
SC-EN610
Motor
- Shimano EP6 DU-EP600 1 speed
DU-EP600EP-600

Suspension

1 part

Fork
- RST

Drivetrain

6 parts

Bottom bracket

STEPS, press-fit Not identified
Cassette
- Shimano CS-LG400-11 11 speeds
CS-LG400-11
Chain
- KMC
Crankset
- Shimano Steps
EN-600
Rear derailleur
- Shimano Cues RD-U6000 11 speeds
RD-U6000
Shifters
- Shimano Cues SL-U6000
SL-U6000

Brakes

1 part

Brakes
- TRP SLATE EVO

Wheels and tires

5 parts

Front hub

QUANDO, 15 × 110 mm thru front axle, 12 × 148 mm thru rear axle, 32 holes Not identified
Rear hub

QUANDO, 15 × 110 mm thru front axle, 12 × 148 mm thru rear axle, 32 holes Not identified
Rims
- Author
Spokes

black stainless steel 2.2 mm Not identified
Tires
- Vittoria

Cockpit and contact points

6 parts

Grips
- Author
Handlebar
- Author
Pedals

HT platform Not identified
Saddle
- Author
Seatpost
- Author
Stem
- Author

Sizes and geometry

2 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 17"

Table

Reach 402mm

Stack 647mm

Wheelbase 1155mm

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 2 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	402	419
Stackmm	647	656
Top tube lengthmm	600	620
Seat tube lengthmm	432	483
Head tube lengthmm	120	130
Head tube angle	68°	68°
Seat tube angle	73°	73°
Chainstay lengthmm	460	460
Wheelbasemm	1155	1176
Front centermm	700	721
Bottom bracket dropmm	51	51
Bottom bracket heightmm	304	304
Fork rakemm	43	43
Trailmm	89	89
Stack/reach ratio	1.61	1.57
Suspension and parts
Crank lengthmm	170	175
Handlebar widthmm	680	700
Stem lengthmm	60	80

Not published by the manufacturer: Standover height, Front travel, Rear travel, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Bicycle weight: 23.4 kg

51.6 lb

Suspension

Suspension configuration: Hardtail
Front travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 38
Largest chainring: 38
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 20.9 in
Highest gear: 95.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Electric system

Battery capacity: 630 Wh

Additional specifications

Battery: SHIMANO EN806 Li-Ion, 36 V, 17,5 Ah, 630 Wh
Bottom bracket standard: Shimano STEPS
Fork spring: Air
Tire width: 2.25″
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: 2025
Sample: 1,810 bicycles with this information
Coverage: 97.5% of the class

Lowest gear

20.9 gear inches

This value is above the central range for this class.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,384 bicycles with this information
Coverage: 74.6% of the class

Highest gear

95.0 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,384 bicycles with this information
Coverage: 74.6% of the class

Shifting

Mechanical

388 of 1,849 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,849 bicycles with this information
Coverage: 99.6% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.0 km/h
Highest gear: 36.4 km/h

Total gear range 455%

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: 20.9–95.0 gear inches
Class reference (p10–p90): 17.1–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2025
Lowest gear: 1384 bicycles with this information, 74.6% of the class
Highest gear: 1384 bicycles with this information, 74.6% 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 2025 builds

Differences across 2025 builds
Specification	This bicycle Author Elevation 27.5 ASL	Author Elevation 29	Author Elevation 29 ASL	Author Elevation ASL
Frame
Bicycle weight	23.4 kg	23.8 kg	23.7 kg	23.4 kg
Suspension
Front travel	120 mm	100 mm	100 mm	120 mm
Drivetrain
Lowest gear	20.9 in	22.0 in	22.0 in	20.9 in
Highest gear	95.0 in	100.2 in	100.2 in	95.0 in
Other specifications
Wheel size	27.5″	29″	29″	27.5″