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The 257 Urbanchallenge AL ONE ST is your all-new urban bike of choice. With its clean looks, exacting attention to detail and functional integration, this is your partner in crime for daily rides.
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 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.
| 01. FRAME | 257 Premium Aluminium Smoothwelded | Staggered Top Tube | Powder Coat Finish | Internal Cable Routing | BSA Threaded Bottom Bracket | Flat Mount Disc | 12x142mm Thru-Axle |
| 02. FORK | 257 Premium Aluminium | Fender Mounts | Flat Mount Disc | 12x100mm Thru-Axle |
| 03. DRIVE UNIT | N/A |
| 04. BATTERY | N/A |
| 05. SEATPOST | Lightskin with Integrated Lights |
| 06. REAR SHOCK | N/A |
| 07. HANDLEBAR | Lightskin with Integrated Lights |
| 08. STEM | BMC MSM01 Stem |
| 09. SADDLE | Selle Royal Vivo Women's |
| 10. CRANKSET | GATES S300 CDX 55T |
| 11. CASSETTE | GATES CDX 24T |
| 12. CHAIN | Belt GATES 120 CDX |
| 13. FRONT DERAILLEUR | N/A |
| 14. REAR DERAILLEUR | N/A |
| 15. SHIFTERS | SHIMANO Alfine 8 Rapidfire Plus |
| 16. BRAKES | SHIMANO MT200/RT10 Rotors (180/160) |
| 17. WHEELSET | N/A |
| 18. RIMS | SR500 |
| 19. HUBS | CL-712 / SHIMANO Alfine 8 |
| 20. TIRES | Pirelli Cycl-e GT 37mm |