With its clean looks, exacting attention to detail and functional integration, the 257 AL THREE ST is your urban partner in crime for daily rides. Its Premium Aluminium frame is light, versatile and powder coated for durability. A powerful kickstand, premium fenders and the reliable Shimano Nexus 8 beltdrive groupset gives you that joyful elegant feeling of velocity and safety.
Technology
Swiss Design
Durable
Functional
Reliable
Technical Overview
Frameset
Frame:
257 Premium Aluminium | Smoothwelded | Staggered Top Tube | Powder Coat Finish | Internal Cable Routing | Flat Mount Disc | 12 x 142mm Thru-Axle
Fork:
257 Premium Aluminium | Fender Mounts | Flat Mount Disc | 12 x 100mm Thru-Axle
Cockpit
Stem:
BMC RSM 01
Handlebar:
BMC LSB 03
Seat
Seatpost:
BMC LSP 02
Saddle:
Selle Royal Vivo Women's
Drivetrain
Crankset:
Gates S150 CDN
Chainrings:
Gates Belt 120 CDXrings
Cassette:
Gates SureFit 3-LOBE Unified CDX2
Cassette Size:
4T
Chain:
Gates Belt 120 CDX
Shifters:
SHIMANO Alfine (SL-S7000) | Rapidfire Plus
Gears:
1 x 8
Bottom Bracket:
BSA Threaded Bottom Bracket
Brakes
Brake Levers / Calipers:
SHIMANO MT200 Levers | BR-U300 Calipers
Rotors:
SHIMANO RT10 Rotors
Rotor Size (F/R):
180 / 180mm
Wheels
Rims:
PFR300
Hubs (F/R):
CL-712 | SHIMANO Nexus 8
Tires:
Pirelli Angel GT | 37mm
Additional Information
Tire Clearance:
42mm
ASTM Classification:
Level 2
System Weight Limit:
120kg
| Size | S | M |
|---|---|---|
| Rider Height | <170 | 170-185 |
| Reach | 390 | 420 |
| Stack | 590 | 640 |
| Bar Width | 600 | 600 |
| BB Drop | 67 | 67 |
| Crank Length | 170 | 170 |
| Fork Length | 408 | 408 |
| Fork Rake | 45 | 45 |
| Front Center | 632 | 680 |
| Head Tube | 165 | 219 |
| Head Tube Angle | 70 | 70 |
| Rear Center | 440 | 440 |
| Seat Angle | 74 | 74 |
| Seat Tube | 450 | 500 |
| Seatpost Length | 350 | 350 |
| Seatpost Offset | 15 | 15 |
| Standover Height | 644 | 653 |
| Stem Angle | ±8 | ±8 |
| Stem Length | 90 | 90 |
| Top Tube | 559 | 603 |
| Trail | 75 | 75 |
| Wheelbase | 1063 | 1111 |
