2025 Trek Bikes FX Sport 4
- Category
- Fitness
- Design
- Flat Bar, Rigid, non-suspension corrected
- Frame
- Carbon/Composite
- Fork
- Carbon/Composite
- Features
- Disc brake
Geometry
XS | S | M | L | XL | |
Stack | 543mm | 568mm | 594mm | 620mm | 648mm |
Reach | 383mm | 385mm | 393mm | 400mm | 410mm |
Stack to Reach Ratio | 1.42:1 | 1.48:1 | 1.51:1 | 1.55:1 | 1.58:1 |
Seat Tube Length, C-T | 356mm | 406mm | 457mm | 508mm | 559mm |
Top Tube Length, Effective/Horizontal Center | 528mm | 543mm | 563mm | 583mm | 613mm |
Top Tube Slope | 22.7deg | 19.7deg | 16.6deg | 13.7deg | 11.2deg |
Head Tube Angle | 70deg | 70.5deg | 71deg | 71.5deg | 72.5deg |
Seat Tube Angle | 75deg | 74.5deg | 74deg | 73.5deg | 72.5deg |
Head Tube Length | 115mm | 140mm | 165mm | 190mm | 215mm |
Bottom Bracket Drop | 65mm | 65mm | 65mm | 65mm | 65mm |
Bottom Bracket Height | 286mm | 286mm | 286mm | 286mm | 286mm |
Chainstay Length | 442mm | 442mm | 442mm | 442mm | 442mm |
Chainstay Length Horizontal | 437.2mm | 437.2mm | 437.2mm | 437.2mm | 437.2mm |
Front-Center | 613.3mm | 620.2mm | 631.2mm | 641.1mm | 648.1mm |
Front-Center Horizontal | 609.8mm | 616.8mm | 627.8mm | 637.8mm | 644.8mm |
Wheelbase | 1047mm | 1054mm | 1065mm | 1075mm | 1082mm |
Fork Offset/Rake | 50mm | 50mm | 50mm | 50mm | 50mm |
Trail | 74.5mm high | 71.3mm high | 68mm high | 64.7mm mid/neutral | 58.2mm mid/neutral |
Mechanical Trail | 70.1mm | 67.2mm | 64.3mm | 61.4mm | 55.6mm |
Wheel Flop | 24mm | 22.4mm | 20.9mm | 19.5mm | 16.7mm |
Standover Height | 708mm | 751mm | 787mm | 812mm | 848mm |
Tire to Pedal Spindle | 92.3mm 170 mm cranks | 99.2mm 170 mm cranks | 110.2mm 170 mm cranks | 120.1mm 170 mm cranks | 127.1mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 116mm 170 mm cranks | 116mm 170 mm cranks | 116mm 170 mm cranks | 116mm 170 mm cranks | 116mm 170 mm cranks |
4 Build
XS | S | M | L | XL | |
Wheel Size | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 40mm | 40mm | 40mm | 40mm | 40mm |
Tire Width Max | 42mm | 42mm | 42mm | 42mm | 42mm |
Tire Outer Diameter | 702mm | 702mm | 702mm | 702mm | 702mm |
Bike Length with Tires | 1749mm | 1756mm | 1767mm | 1777mm | 1784mm |
Published Sizing Recommendations
Height | 4 ft 10 in to 5 ft 1 in | 5 ft 1 in to 5 ft 5 in | 5 ft 5 in to 5 ft 9 in | 5 ft 9 in to 6 ft 1 in | 6 ft 1 in to 6 ft 6 in |
Stack and Reach vs. Category Trend
Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive
The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.
Learn more about the Upright/Aggressive ScaleCategory Trend
FitnessSource:https://www.trekbikes.com/us/en_US/bikes/hybrid-bikes/fitness-bikes/fx/fx-sport-4/p/47243/?colorCode=red_black