Bicycle Archive · Specification report

2025 Polygon Kalosi Altera High Step

Velopedia Archive ID 900001831

Overview

Model year	2025
Brand	Polygon
Model	KALOSI ALTERA HIGH STEP
Bicycle type	Electric-assist
Archive ID	900001831
Original MSRP	$1,499.00
Colors	Blue; Grey
Sizes	M; L

Frameset

Frame construction	ALX Urban
Frame material	Aluminum
Fork	SR Suntour Mobie 32

Drivetrain

Shifters	Shimano Cues SL-U4010-R 9-speed Trigger
Rear derailleur	Shimano Cues RD-U4000 9-speed
Crankset	Prowheel EB01-PRO44A-S3 BK 44TX170mm
Bottom bracket	Bafang SR PA21.32.ST for BB Shell 68mm (Torque Sensor)
Cassette	Shimano Cues CS-LG300-9 9-speed 11-46T Cassette
Chain	KMC Eglide 9/10/11-speed
Pedals	One Piece PP Flat

Brakes

Brakes	Shimano BR-MT201 Hydraulic Disc; Levers: Shimano BL-MT201; Rotors: Shimano SM-RT26 180mm 6B

Cockpit & contact points

Headset	Token TK-1566ZM, ZS 56/28.6 \| ZS 56/40
Handlebar	HSIN LUNG MTB-AL200, W: 680mm, BB: 31.8mm, B: 6degree, R/D: 0mm
Stem	Hsin Lung TDS-D636A, EXT: 75mm, BB: 31.8mm, R/D: Adjustable
Saddle	Selle Royal A059H, Steel Ø7mm
Seatpost	Hsin Lung SP-C261, DXL: 30.9 X 350mm

Wheels & tires

Hubs	F: Alloy 15x100mm 32H 6B / R: Bafang DC Motor 48V 500W 6B
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
Front tire	Maxxis Metropass 27.5"X2.4"
Rear tire	Maxxis Metropass 27.5"X2.4"

E-bike system

Motor	Bafang Rear Motor DC Motor 48V 500W
Battery	Greenway ZZ618 48V15Ah LG21700 3PIN M5.3.2

Geometry · M

Seat tube	431 mm
Effective top tube	593 mm
Head tube	120 mm
Head-tube angle	73°
Seat-tube angle	74°
Actual seat-tube angle	74°
Chainstay / rear center	445 mm
Wheelbase	1091 mm
Bottom-bracket drop	70 mm
Bottom-bracket height	294.5 mm
Reach	415 mm
Stack	621 mm
Standover height	714 mm

Geometry · L

Seat tube	470 mm
Effective top tube	621 mm
Head tube	130 mm
Head-tube angle	73°
Seat-tube angle	74°
Actual seat-tube angle	74°
Chainstay / rear center	445 mm
Wheelbase	1119 mm
Bottom-bracket drop	70 mm
Bottom-bracket height	294.5 mm
Reach	440 mm
Stack	630.5 mm
Standover height	748 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 13, 2026.