2026 Trek Bikes FX Sport AL 3 XS (40)
Build
700C/29 in × 42 mm
Insights
Design deviates from other sizes of Trek Bikes FX Sport
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 543mm |
| Reach | 383mm |
| Stack to Reach Ratio | 1.42:1 |
| Seat Tube Length, C-C | 330mm |
| Top Tube Length, Effective/Horizontal Unknown | 528mm |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 75deg |
| Head Tube Length | 115mm |
| Bottom Bracket Drop | 65mm |
| Bottom Bracket Height | 288mm |
| Chainstay Length | 447mm |
| Chainstay Length Horizontal | 442.3mm |
| Front-Center | 613.2mm |
| Front-Center Horizontal | 609.8mm |
| Wheelbase | 1052mm |
| Fork Offset/Rake | 50mm |
| Trail | 75.3mm high |
| Mechanical Trail | 70.7mm |
| Wheel Flop | 24.2mm |
| Standover Height | 675mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 90.2mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 118mm |
AL 3 Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 42mm |
| Tire Outer Diameter | 706mm |
| Bike Length with Tires | 1758mm |
| Crank Length | 170mm |
| Handlebar Width | 600mm |
| Stem Length | 70mm |
| Stem Angle | 7deg |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Flat Bar |
| Frame Material | Aluminum |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 147 cm to 155 cm |
| PBH | 69 cm to 73 cm |
Source:https://www.trekbikes.com/pl/pl_PL/rowery/rowery-hybrydowe/rowery-fitness/fx/fx-sport/f/F421-1/fx-sport-al-3/58592/5339888