An all-new urban boost, the 257 AL AMP is your amplified partner in crime for daily rides. Designed with clean aesthetics, precise attention to detail, and smart integration, the 257 AL AMP ONE ST features a lightweight premium aluminium frame with a durable, powder-coated finish built to withstand the rigors of urban life. The mixte frame design makes it easy to get on and off the bike, adding comfort and convenience for everyday use, maxing it an ideal e-bike specifically desgined for women.
The naturally powerful and intuitive Bosch Performance CX Smart System motor, combined with a long-lasting 625 Wh battery, delivers smooth, responsive acceleration and extended range - perfect for commuting, grabbing a coffee, or cruising around town at your own pace.
A low-maintenance Gates Carbon Drive belt system replaces the traditional chain, offering a silent, grease-free ride with exceptional durability and reliability, even in challenging conditions.
Comfort meets performance with the ICS MTT suspension stem, absorbing road vibrations to ensure a smoother ride. Integrated premium lights provide enhanced visibility and safety, day or night, making the 257 AL AMP ONE the ideal choice for modern urban mobility.
Technology
Powerful Companion
Swiss Design
Durable
Safe
Technical Overview
Frameset
Frame:
257 AMP Premium Aluminium | Smoothwelded | Integrated Battery | Internal Cable Routing | Powder Coat Finish | Flat Mount Disc | Internal Gear Hub dropouts
Fork:
257 Premium Aluminium | Fender Mounts | Post Mount Disc | 12 x 100mm Thru-Axle
E-System
Drive Unit:
Bosch Performance CX Smart System
Battery Pack:
Bosch PowerTube | 625 Wh | Certified by Intertek Testing Services NA, Inc.
Display:
Bosch Kiox 300
Drive Unit Control:
Bosch Led Remote
Charger:
Bosch 4A Charger
Cockpit
Stem:
ICS MTT x Redshift Suspension Stem | Integrated Cockpit System Technology
Handlebar:
BMC LSB 01
Seat
Seatpost:
BMC LSP 02
Saddle:
Selle Royal Vivo Women's
Drivetrain
Crankset:
Miranda Classic x Bosch | Gates CDX
Chainrings:
46T
Cassette:
Gates CDX
Cassette Size:
22T
Chain:
Gates Belt 113 CDN
Shifters:
SHIMANO Alfine (SL-S7000) | Rapidfire Plus
Gears:
1 x 8
Brakes
Brake Levers / Calipers:
TEKTRO TRP HD-EU832
Rotors:
TEKTRO RC01E
Rotor Size (F/R):
180 / 160mm
Wheels
Rims:
E-SRX30
Hubs (F/R):
CL-712 | SHIMANO Alfine 8
Tires:
Pirelli Angel GT | 37mm
Additional Information
Tire Clearance:
42mm measured tire
ASTM Classification:
Level 2
System Weight Limit:
120kg
General Product Safety Regulation (GPSR):
Safety Instructions GPSR (EU)
Responsible person according to GPSR (EU)
| Size | S | M |
|---|---|---|
| Rider Height | 160 - 172 | 170 - 184 |
| Reach | 424 | 420 |
| Stack | 590 | 640 |
| Bar Sweep | 9° | 9° |
| Bar Width | 680 | 680 |
| BB Drop | 67 | 67 |
| Crank Length | 170 | 170 |
| Fork Length | 408 | 408 |
| Fork Rake | 45 | 45 |
| Front Center | 665 | 679 |
| Head Tube | 165 | 217 |
| Head Tube Angle | 70 | 70 |
| Rear Center | 428-441 | 428-441 |
| Seat Angle | 75° | 75° |
| Seat Tube | 450 | 450 |
| Seatpost Length | 350 | 400 |
| Seatpost Offset | 15 | 15 |
| Standover Height | 649 | 672 |
| Stem Angle | 0° | 0° |
| Stem Length | 72 | 80 |
| Top Tube | 582 | 591 |
| Trail | 75 | 75 |
| Wheelbase | 1084-1097 | 1098-1111 |
