Polygon Kalosi Altera LOW Step

2026 UrbanCommuter Electric bicycle Manufacturer page

Last known price: $1,499

Prices shown first for United States
Wheels: 650b
Drivetrain: 1 × 9 44t / 11–46t
Gear range: 418%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

MD 160–171
LG 169–180

Components

15 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

aluminum Not identified

Electric system

2 parts

Battery

GREENWAY ZZ618 48V15AH LG21700 3PIN M5.3.2 Not identified
Motor
- Bafang

Suspension

1 part

Fork
- SR Suntour MOBIE

Drivetrain

6 parts

Bottom bracket
- Bafang
Cassette
- Shimano CS-LG300-9 9 speeds 11–46t
CS-LG300
Chain
- KMC
Crankset
- Prowheel
Rear derailleur
- Shimano Cues RD-U4000 9 speeds
RD-U4000
Shifters
- Shimano Cues SL-U4010 9 speeds
SL-U4010

Brakes

3 parts

Brake levers
- Shimano BL-MT201
BL-MT201
Brakes
- Shimano
BR-MT201
Disc rotors
- Shimano SM-RT26
SM-RT26

Wheels and tires

5 parts

Front hub

ALLOY 15x100mm 32H 6B Not identified
Rear hub
- Bafang
Rims

F: ALLOY DOUBLE WALL H:19mm W: 23mm 584-23 32H FOR TYRE 584-54/71 / R: ALLOY DOUBLE WALL H:19mm W: 23mm 584-23 36H FOR TYRE 584-54/71 Not identified
Spokes

F: 13G STAINLESS NDS:270mm DS:272mm W/ 13mm BRASS NIPPLE / R: 12G STAINLESS NDS:230mm DS:230mm W/ 13mm BRASS NIPPLE Not identified
Tires
- Maxxis Metropass

Cockpit and contact points

5 parts

Handlebar

HSIN LUNG MTB-AL200, W: 680mm, BB: 31.8mm, B: 6degree, R/D: 0mm Not identified

MTB-AL200
Headset
- Token
TK-1566ZM
Pedals

ONE PIECE PP FLAT Not identified
Saddle
- Selle Royal
Seatpost

HSIN LUNG SP-C261, DxL: 30.9 x 350mm Not identified

SP-C261

Sizes and geometry

2 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 385mm

Stack 621mm

Wheelbase 1061mm

Head angle 73.0°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 650b 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
Reachmm	385	415
Stackmm	621	621
Top tube lengthmm	593	593
Seat tube lengthmm	400	431
Head tube lengthmm	120	120
Head tube angle	73°	73°
Seat tube angle	74°	74°
Chainstay lengthmm	445	445
Wheelbasemm	1061	1091
Front centermm	625	655
Bottom bracket dropmm	70	70
Bottom bracket heightmm	294.5	294.5
Standover heightmm	521	521
Fork rakemm	65	65
Trailmm	33	33
Stack/reach ratio	1.61	1.50

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

Suspension

Suspension configuration: Hardtail

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 44
Largest chainring: 44
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 46
Lowest gear: 26.3 in
Highest gear: 110.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Battery: GREENWAY ZZ618 48V15AH LG21700 3PIN M5.3.2
Tire width: 2.4″
Travel: Front: Additional specification: Not available: No
Wheel material: Aluminum
Wheel size: 650b

Gearing

Estimated speeds at 80 rpm

Lowest gear: 10.1 km/h
Highest gear: 42.1 km/h

Total gear range 418%

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: 26.3–110.0 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
Specification	This bicycle Polygon Kalosi Altera LOW Step	Polygon Kalosi Altera High Step	Polygon Kalosi Lanes EVO High Step	Polygon Kalosi Lanes EVO LOW Step	Polygon Kalosi Lanes Prime	Polygon Kalosi Miles High Step
Suspension
Front travel	Not informed	Not informed	100 mm	100 mm	Not informed	63 mm
Drivetrain
Rear sprockets	9	9	10	10	11	9
Largest sprocket	46	46	48	48	50	46
Lowest gear	26.3 in	26.3 in	25.2 in	25.2 in	24.2 in	27.7 in
Highest gear	110.0 in	110.0 in	110.0 in	110.0 in	110.0 in	116.0 in
Electric bicycle systems
Battery capacity	Not informed	Not informed	504 Wh	504 Wh	625 Wh	520 Wh
Other specifications
Tire width	2.4″	2.4″	2.4″	2.4″	2.4″	Not informed
Wheel size	650b	650b	650b	650b	650b	29″
Fork spring	Not informed	Not informed	Coil	Coil	Not informed	Coil