Superior eRX 6.3

Name: Superior eRX 6.3
Brand: Superior

2026 RoadTouring Electric bicycle Manufacturer page

Wheels: 29″
Drivetrain: 1 × 8 38t / 11–45t
Gear range: 409%
Battery: 500 Wh
Weight: 27.35 kg 60.3 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

14 of 27 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 Al-6061 T6 Custom tubing, Smooth Welding, Fun Ride Geometry, Sport Drive MID Motor, OLD 135x9, Disc Brake Post Mount, Fender&Kickstand Ready Dropout, Replaceable RD Hanger, Inner Cable Routing Not identified

Electric system

4 parts

Battery

SPORT DRIVE fully integrated downtube battery, 36V, 500 Wh Not identified
Charger

SPORT DRIVE charger, 36V/4A, charging time up to 3,5 hours Not identified
Display

SPORT DRIVE Color display with USB port Not identified
Motor

SPORT DRIVE middle motor MD250S Not identified

Suspension

1 part

Fork
- SR Suntour NVX30

Drivetrain

5 parts

Cassette
- Shimano CS-HG400-8 8 speeds 11–45t
CS-HG400
Chain
- KMC
Crankset

Wheel Top ED2L Not identified
Rear derailleur
- Shimano Essa RD-U2000 8 speeds
RD-U2000
Shifters
- Shimano Altus SL-M315-8R 8 speeds
SL-M315-8R

Brakes

1 part

Brakes
- Shimano BR-MT200
BR-MT200

Wheels and tires

5 parts

Front hub
- Shimano HB-TX505
HB-TX505
Rear hub
- Shimano FH-TX505-8 11 speeds
FH-TX505
Rims

STARS J30D, Disc, 32H Not identified
Spokes
- Sapim Leader
Tires

Rubena Cheetah, 29x2,1" Not identified

Cockpit and contact points

6 parts

Handlebar

ONE Alloy, 25mm rise, 31.8mm Not identified
Headset
- FSA
Pedals
- Marwi
SP-610
Saddle
- Selle Royal Vivo
Seatpost

ONE, Alloy, Suspension, 30.9mm Not identified
Stem

ONE, Alloy, 31,8mm, +3° Not identified

Other components

4 parts

Fenders

Alloy Not identified
Lights
- AXA
Lock

Frame Lock Not identified
Racks
- Atran

Sizes and geometry

2 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size SM

Table

Reach 428mm

Stack 669mm

Wheelbase 1212mm

Head angle 67.0°

Seat angle 74.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 2 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	428	459
Stackmm	669	669
Top tube lengthmm	613	644
Seat tube lengthmm	432	473
Head tube lengthmm	180	180
Head tube angle	67°	67°
Seat tube angle	74.5°	74.5°
Chainstay lengthmm	476	476
Wheelbasemm	1212	1243
Front centermm	742	773
Bottom bracket dropmm	60	60
Fork rakemm	49	49
Trailmm	89	89
Stack/reach ratio	1.56	1.46
Suspension and parts
Handlebar widthmm	720	720

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

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Bicycle weight: 27.35 kg

60.3 lb

Suspension

Suspension configuration: Hardtail

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 38
Largest chainring: 38
Rear sprockets: 8
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: suspension
Shifting: Mechanical

Electric system

Battery capacity: 500 Wh

Additional specifications

Battery: SPORT DRIVE fully integrated downtube battery, 36V, 500 Wh
Fork spring: Coil
Tire width: 2.1″
Travel: Front: Additional specification: Not available: No
Wheel material: Aluminum
Wheel size: 29″

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 2026 builds

Differences across 2026 builds
Specification	This bicycle Superior eRX 6.3	Superior eRX 6.2	Superior eRX 6.2 LS	Superior eRX 6.2 MS	Superior eRX 6.3 LS	Superior eRX 6.4 LS \| 500Wh
Frame
Bicycle weight	27.35 kg	Not informed	24.9 kg	Not informed	27.35 kg	27.25 kg
Fork material	Not informed	Not informed	Carbon	Not informed	Not informed	Not informed
Drivetrain
Rear sprockets	8	9	9	9	8	10
Largest sprocket	45	36	36	36	45	48
Lowest gear	24.5 in	30.6 in	30.6 in	30.6 in	24.5 in	21.8 in
Highest gear	100.2 in	100.2 in	100.2 in	100.2 in	100.2 in	95.0 in
Cockpit
Seatpost	suspension	Rigid seatpost	suspension	Rigid seatpost	suspension	Rigid seatpost
Electric bicycle systems
Battery capacity	500 Wh	504 Wh	504 Wh	504 Wh	500 Wh	504 Wh
Other specifications
Tire width	2.1″	50c	1.75″	50c	2.1″	2.35″
Wheel size	29″	29″	29″	29″	29″	650b
Bottom bracket standard	Not informed	Shimano STEPS	Shimano STEPS	Shimano STEPS	Not informed	Bosch