2023 BMC Switzerland 257 AL Four S
Build
700C/29 in × 37 mm
Insights
Somewhat aggressive stack and reach vs trend of off-road touring bikes
Stack and Reach vs. Category Trend
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Geometry
| Stack | 590mm |
| Reach | 390mm |
| Stack to Reach Ratio | 1.51:1 |
| Seat Tube Length, C-T | 450mm |
| Top Tube Length, Actual C-C | 559mm |
| Top Tube Slope | 17deg |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 165mm |
| Bottom Bracket Drop | 67mm |
| Bottom Bracket Height | 281mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 434.9mm |
| Front-Center | 632mm |
| Front-Center Horizontal | 628.1mm |
| Wheelbase | 1063mm |
| Fork Offset/Rake | 45mm |
| Fork Length (On-Axis) | 408mm |
| Trail | 78.8mm high |
| Mechanical Trail | 74mm |
| Wheel Flop | 25.3mm |
| Standover Height | 644mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 114mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 111mm |
Four Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 37mm |
| Tire Outer Diameter | 696mm |
| Bike Length with Tires | 1759mm |
| Crank Length | 170mm |
| Handlebar Width | 600mm |
| Stem Length | 90mm |
| Stem Angle | 8deg |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Aluminum |
| Fork Material | Aluminum |
| Brake Type | Disc |
| Features | Women's |
Published Sizing Recommendations
| Height | 14 ft 2 in to |
Source:https://bmc-switzerland.com/products/257-al-four-st-bikes-bmc-23-10403-010?srsltid=AfmBOoqI8U6_1TBI7g51Mk-f8tB471RU9Iv3YpOzwUk8ORP9y8ymP5n2#geometry_NUGnEj