With its clean looks, exacting attention to detail and functional integration, the 257 AL FOUR ST is the partner in crime for your daily rides. Its Premium Aluminium frame is light, versatile and powder coated for durability. A powerful kickstand, premium fenders and the intuitive Shimano Deore 1x11 single chainring groupset gives you that joyful elegant feeling of velocity and safety.
Technology
Swiss Design
Durable
Functional
Simple
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:
FSA Vero Pro
Chainrings:
SHIMANO HG601rings
Cassette:
SHIMANO Deore (CS-M5100)
Cassette Size:
11-42T
Chain:
SHIMANO HG601
Rear Derailleur:
SHIMANO Deore (RD-M5120)
Shifters:
SHIMANO Deore (SL-M5100) | Rapidfire Plus
Gears:
1 x 11
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 | RXC-142S
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 |
