2025 Trek
FX 2 Gen 4
Suspension
Wheels
Drivetrain
Brakes
Frame
Weight
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Expert Review, Specs & Price
Expert Review
Trek kept it practical with this generation of FX 2 and it rides like a sporty commuter that won't fuss. On smooth city loops it's lively and efficient, with a road-like forward position that still feels controlled when traffic gets sketchy. Key bits are the 35 mm tires with room to 40 mm for a bit more comfort, hydraulic disc brakes, Alpha Gold aluminum frame and 1x9 mechanical CUES drivetrain on aluminum wheels. Riders who want a fast, utility-ready flat-bar bike will like it, but you trade a bit of lightness for those practical mounts and durability.
Pros
- 35 mm tires hit a nice balance between speed and comfort for cracked urban pavement
- Hydraulic disc brakes bring consistent stopping power in wet city conditions
- Rack, fender and kickstand mounts make weekday commuting and errands straightforward
- Alpha Gold aluminum frame with internal routing keeps the bike tidy and durable
Cons
- 11.81 kg weight is a touch heavier for riders chasing every gram on tempo sessions
- Aluminum wheels add mass compared with lighter options, which affects fast accelerations
- 1x9 mechanical CUES drivetrain limits gear range for long climbs or fast mixed-terrain rides
Best for :
- Fast commutes and city loops with mixed road surfaces
- Riders who want a road-like, sporty flat-bar position
- Weekend fitness rides that need practical carrying options
- Someone who values low-maintenance hardware and durability
Not for :
- Riders chasing the lightest possible bike for racing or long climbs
Best used Bike Trek deals
Certified pre-owned · 30-day satisfaction guarantee · Free US shipping
$833
Up to -60%
At a glance
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Geometry & sizing
Available sizes
| Measurement | 40cm | 45cm | 50cm | 55cm | 60cm |
|---|---|---|---|---|---|
| Stack | 543.0mm | 568.0mm | 594.0mm | 620.0mm | 648.0mm |
| Reach | 383.0mm | 385.0mm | 393.0mm | 399.0mm | 409.0mm |
| Top tube | 528.0mm | 543.0mm | 563.0mm | 583.0mm | 613.0mm |
| Head tube length | 115.0mm | 140.0mm | 165.0mm | 190.0mm | 215.0mm |
| Head tube angle | 70.00° | 70.50° | 71.00° | 71.50° | 72.50° |
| Seat tube length | 330.0mm | 375.0mm | 420.0mm | 465.0mm | 520.0mm |
| Seat tube angle | 75.00° | 74.50° | 74.00° | 73.50° | 72.50° |
| Chainstay | 447.0mm | 447.0mm | 447.0mm | 447.0mm | 447.0mm |
| Wheelbase | 1052.0mm | 1059.0mm | 1070.0mm | 1080.0mm | 1087.0mm |
| Standover height | 675.0mm | 715.0mm | 754.0mm | 791.0mm | 836.0mm |
| Trail | 74.0mm | 71.0mm | 68.0mm | 64.0mm | 58.0mm |
Measurements in mm and degrees. Values may vary depending on options.
Best used Bike Trek deals
Certified pre-owned · 30-day satisfaction guarantee · Free US shipping
$833
Up to -60%
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Trek FX 2 Gen 4 of 2025
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