Trek FX 3 (Gen 4) Fitness Bike 2025
FX 3 is a versatile hybrid bike that's primed for performance, comfort, and utility. It has features like a lightweight aluminum frame, a carbon fork, a 1x drivetrain, and powerful disc brakes that stop in any weather. It's a commuting pro if you want it to be, or the perfect fitness companion on pavement and rail trails.
It's right for you if...
You're a commuter or fitness rider who’s having fun spending more time in the saddle. You want a great-looking bike that's versatile, comfortable, and built with quality parts that will perform on longer rides.
The tech you get
A lightweight aluminum frame, a carbon fork, hydraulic disc brakes for all-weather stopping power, and a simple 1x drivetrain that ditches the front derailleur for less clutter and easier operation. Don't worry, with the wide-range 11-46 cassette still gives you all the gears you need to conquer hills and crush flats. Plus, you get vibration-absorbing handlebars with ergonomic grips for more comfort on every ride.
The final word
FX 3 is a lightweight and fast fitness bike, commuter, and neighborhood cruiser all in one. For all the great things about this bike, the best tech upgrade is the simple-yet-capable 1x10 drivetrain.
Why you'll love it
- The 1x drivetrain gives you all the gears you need and none you don’t
- It's easy to accessorize with a MIK rear rack, a kickstand, fenders, lights, and more!
- It's versatile and does whatever you want it to do, whether that's riding for fitness, commuting, or cruising to the farmer's market to pick up groceries
- The cables are routed internally, which protects them from the elements and adds to the bike's sleek look
SPECIFICATIONS
*Please note - spec applies to all sizes unless listed separately
Frameset
Frame Alpha Gold Aluminum, internal cable routing, rack & fender mounts, post mount disc, kickstand mount, 135x5mm QR
Fork FX carbon, flat-mount disc, rack mounts, 410mm axle-to-crown, ThruSkew 5mm QR
Wheels
Hub front Formula DC-20, alloy, 6-bolt, 5x100 mm QR
Skewer front 139x5mm bolt-on
Hub rear Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5 mm QR
Skewer rear 152x5mm QR
Rim Bontrager Tubeless Ready Disc, 32-hole, Presta valve
Tire Bontrager H2 Comp, wire bead, 30 tpi, 700x35mm
Max tire size 700x40mm
Drivetrain
Shifter Shimano CUES U6000 w/optical gear display, 10 speed
Rear derailleur Shimano CUES U6000 GS
*Crank Size: XS, S, M
Prowheel alloy, 40T narrow-wide ring, 170 mm length
Size: L, XL
Prowheel alloy, 40T narrow-wide ring, 175 mm length
Size: XXL
ProWheel alloy, 40T narrow-wide ring, 175mm length
Cassette Shimano CUES LG300, LINKGLIDE, 11-48, 10 speed
Chain Shimano LG500
Pedal Bontrager City pedals
Max chainring size 1x: 44T, 2x: 46/32
Components
Saddle Bontrager H1
Seatpost Bontrager alloy, 27.2mm, 12mm offset, 330mm length
*Handlebar Size: XS, S, M
Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise, 600 mm width
Size: L, XL, XXL
Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise, 660 mm width
Grips Bontrager Satellite IsoZone Plus, lock-on, ergonomic
*Stem Size: XS, S
Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 90mm length
Size: M, L, XL, XXL
Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 100mm length
Brake Shimano hydraulic disc, MT201 lever, UR300 caliper
Brake rotor Shimano RT26, 6-bolt, 160mm
Rotor size Max brake rotor sizes: 160mm front & rear
Weight
Weight M - 11.50 kg / 25.36 lbs
Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.
Trek FX 3 (Gen 4) Fitness Bike 2025
FX 3 is a versatile hybrid bike that's primed for performance, comfort, and utility. It has features like a lightweight aluminum frame, a carbon fork, a 1x drivetrain, and powerful disc brakes that stop in any weather. It's a commuting pro if you want it to be, or the perfect fitness companion on pavement and rail trails.
It's right for you if...
You're a commuter or fitness rider who’s having fun spending more time in the saddle. You want a great-looking bike that's versatile, comfortable, and built with quality parts that will perform on longer rides.
The tech you get
A lightweight aluminum frame, a carbon fork, hydraulic disc brakes for all-weather stopping power, and a simple 1x drivetrain that ditches the front derailleur for less clutter and easier operation. Don't worry, with the wide-range 11-46 cassette still gives you all the gears you need to conquer hills and crush flats. Plus, you get vibration-absorbing handlebars with ergonomic grips for more comfort on every ride.
The final word
FX 3 is a lightweight and fast fitness bike, commuter, and neighborhood cruiser all in one. For all the great things about this bike, the best tech upgrade is the simple-yet-capable 1x10 drivetrain.
Why you'll love it
- The 1x drivetrain gives you all the gears you need and none you don’t
- It's easy to accessorize with a MIK rear rack, a kickstand, fenders, lights, and more!
- It's versatile and does whatever you want it to do, whether that's riding for fitness, commuting, or cruising to the farmer's market to pick up groceries
- The cables are routed internally, which protects them from the elements and adds to the bike's sleek look
SPECIFICATIONS
*Please note - spec applies to all sizes unless listed separately
Frameset
Frame Alpha Gold Aluminum, internal cable routing, rack & fender mounts, post mount disc, kickstand mount, 135x5mm QR
Fork FX carbon, flat-mount disc, rack mounts, 410mm axle-to-crown, ThruSkew 5mm QR
Wheels
Hub front Formula DC-20, alloy, 6-bolt, 5x100 mm QR
Skewer front 139x5mm bolt-on
Hub rear Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5 mm QR
Skewer rear 152x5mm QR
Rim Bontrager Tubeless Ready Disc, 32-hole, Presta valve
Tire Bontrager H2 Comp, wire bead, 30 tpi, 700x35mm
Max tire size 700x40mm
Drivetrain
Shifter Shimano CUES U6000 w/optical gear display, 10 speed
Rear derailleur Shimano CUES U6000 GS
*Crank Size: XS, S, M
Prowheel alloy, 40T narrow-wide ring, 170 mm length
Size: L, XL
Prowheel alloy, 40T narrow-wide ring, 175 mm length
Size: XXL
ProWheel alloy, 40T narrow-wide ring, 175mm length
Cassette Shimano CUES LG300, LINKGLIDE, 11-48, 10 speed
Chain Shimano LG500
Pedal Bontrager City pedals
Max chainring size 1x: 44T, 2x: 46/32
Components
Saddle Bontrager H1
Seatpost Bontrager alloy, 27.2mm, 12mm offset, 330mm length
*Handlebar Size: XS, S, M
Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise, 600 mm width
Size: L, XL, XXL
Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise, 660 mm width
Grips Bontrager Satellite IsoZone Plus, lock-on, ergonomic
*Stem Size: XS, S
Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 90mm length
Size: M, L, XL, XXL
Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 100mm length
Brake Shimano hydraulic disc, MT201 lever, UR300 caliper
Brake rotor Shimano RT26, 6-bolt, 160mm
Rotor size Max brake rotor sizes: 160mm front & rear
Weight
Weight M - 11.50 kg / 25.36 lbs
Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.
Trek FX 3 (Gen 4) Fitness Bike 2025
SKU: 210000310703
- Regular price
- $1,229.99
- Sale price
- $1,229.99
- Regular price
-
$0.00