An all-new Urban boost, the 257 AMP is your amplified partner in crime for daily rides. With its clean looks, exacting attention to detail and functional integration, the 257 AMP AL ONE ST features a lightweight and versatile Premium Aluminium frame with powder coated finish for durability. The naturally engaging and powerful BOSCH Performance CX belt drive motor combined with the comfort enhancing ICS MTT Stem and premium lights give you that joyful elegant feeling of velocity and safety.
Technology
Powerful Companion
Swiss Design
Durable
Safe
Technical Overview
Frameset
Frame:
257 AMP Premium Aluminium | Smoothwelded | Staggered Top Tube | Integrated Battery | Internal Cable Routing | Powder Coat Finish | Post Mount Disc | 12 x 142mm Thru-Axle
Fork:
257 Premium Aluminium | Fender Mounts | Flat Mount Disc | 12 x 100mm Thru-Axle
E-System
Drive Unit:
Bosch Performance Line CX
Battery Pack:
Bosch PowerTube | 625 Wh | Certified by Intertek Testing Services NA, Inc.
NYC Lithium-Ion Battery Safety Guidelines
Display:
Bosch Kiox
Drive Unit Control:
Bosch Kiox
Charger:
Bosch Compact 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:
Gates Belt 113 CDXrings
Cassette:
Gates CDX
Cassette Size:
22T
Chain:
Gates Belt 113 CDX
Shifters:
SHIMANO Alfine (SL-S7000) | Rapidfire Plus
Gears:
1 x 8
Brakes
Brake Levers / Calipers:
TEKTRO HD-EU818 / 817
Rotors:
TEKTRO TR25
Rotor Size (F/R):
180 / 160mm
Wheels
Rims:
SR500
Hubs (F/R):
CL-712 | SHIMANO Alfine 8
Tires:
Pirelli Angel GT | 37mm
Additional Information
Tire Clearance:
42mm
Weight without Pedals:
21.9 Kg
ASTM Classification:
Level 2
System Weight Limit:
120kg
| Size | S | M |
|---|---|---|
| Rider Height | 160-172 | 170-184 |
| Reach | 424 | 420 |
| Stack | 590 | 640 |
| 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 | 440 | 440 |
| Seat Angle | 75 | 75 |
| Seat Tube | 450 | 450 |
| Seatpost Length | 350 | 350 |
| Seatpost Offset | 15 | 15 |
| Standover Height | 649 | 672 |
| Stem Length | 70 | 70 |
| Top Tube | 582 | 591 |
| Trail | 75 | 75 |
| Wheelbase | 1096 | 1110 |
