Opus Railtrail EP6

Name: Opus Railtrail EP6
Brand: Opus

2025 MountainCross-country Electric bicycle Manufacturer page

Fork travel: 100 mm
Wheels: 29″
Drivetrain: 1 × 11 38t / 11–45t
Gear range: 409%
Battery: 418 Wh
Weight: 21 kg 46.3 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–170
MD 168–179
LG 176–187

Components

19 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

Lightweight trail inspired aluminum frame Not identified

Electric system

3 parts

Battery
- Shimano BT-EN604
BT-EN604EN-604
Display
- Shimano SC-EN500
SC-EN500
Motor
- Shimano EP6 DU-EP600 1 speed
DU-EP600

Suspension

1 part

Fork
- SR Suntour
XCM-34

Drivetrain

7 parts

Bottom bracket

None
Cassette
- Shimano
Chain
- KMC
Crankset
- Shimano FC-EM600
FC-EM600
Front derailleur

None
Rear derailleur
- Shimano Cues RD-U6000 11 speeds
RD-U6000
Shifters
- Shimano Cues SL-U6000
SL-U6000

Brakes

2 parts

Brake levers
- Shimano BL-MT401
BL-MT401
Brakes
- Shimano BR-MT420
BR-MT420

Wheels and tires

4 parts

Front hub
- Shimano
Rear hub
- Shimano
Rims

Weinnman U32 TL Not identified
Tires
- Kenda Booster

Cockpit and contact points

6 parts

Handlebar
- Zoom
Headset
- FSA ORBIT IS 138
Pedals

FPD NW-420 Not identified

NW-420
Saddle
- Opus
Seatpost
- ProMax
Stem
- Zoom

Sizes and geometry

3 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Geometry diagram unavailable

The drawing needs wheelbase, 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
Frame
Reachmm	383	405	421
Stackmm	627	645	657
Top tube lengthmm	557	585	616
Seat tube lengthmm	430	480	510
Head tube lengthmm	100	115	130
Head tube angle	69°	69.5°	69.5°
Seat tube angle	74.5°	73.5°	73.5°
Chainstay lengthmm	445	445	445
Bottom bracket dropmm	65	65	65
Bottom bracket heightmm	309	309	309
Stack/reach ratio	1.64	1.59	1.56
Suspension and parts
Crank lengthmm	170	170	170
Handlebar widthmm	780	780	780
Stem lengthmm	45	45	55

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

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Bicycle weight: 21 kg

46.3 lb

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 38
Largest chainring: 38
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 45
Lowest gear: 24.5 in
Highest gear: 100.2 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Electric system

Battery capacity: 418 Wh

Additional specifications

Battery: Shimano EN-604 418Wh 36V 11.6Ah battery
Fork spring: Coil
Tire width: 2.2″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

2 measures

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

Front travel

100 mm

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2025
Sample: 1,508 bicycles with this information
Coverage: 87.8% of the class

Shifting

Mechanical

222 of 1,648 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2025
Sample: 1,648 bicycles with this information
Coverage: 95.9% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.4 km/h
Highest gear: 38.4 km/h

Total gear range 409%

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: 24.5–100.2 gear inches

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
Specification	This bicycle Opus Railtrail EP6	Opus Railtrail
Drivetrain
Largest sprocket	45	42
Lowest gear	24.5 in	26.2 in
Other specifications
Battery	Capacity: 418 WhShimano EN-604 418Wh 36V 11.6Ah battery	Capacity: 418 WhShimano E-8014 418Wh 36V 11.6Ah battery