New arrival 44% off

Trek fx sport 4

$999.93 $1,799.99
By Trek
SKU: 5267812 // Barcode: 601842667095
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FX Sport 4 is a carbon fiber fitness bike for riders who want the speed of a lightweight road bike with the comfort and control of a flat handlebar. The 1x drivetrain simplifies shifting without sacrificing gear range, making this high-performance bike perfect for everything from solo workouts to speedy group rides.
  • The 1x drivetrain delivers a wide range of gearing with the simplicity of a single shifter
  • You get the superior ride quality of carbon without the bank-breaking price
  • On your left, roadie! This fitness bike is more than capable of taking on speedy group road rides
  • Its easy to accessorize with fenders, lights, and more!

Make it your own

Customize your bike with fenders, racks, bottle cages, and more to make it your own.

1x drivetrain

A 1x drivetrain means more versatility, simpler shifting and less things to go wrong. You still have a wide range of gears, but with lighter and more intuitive shifting. Everything you need and nothing more.

Just-right geometry

The all-new FX Sport has slightly less reach and slightly more stack than previous models for a more comfortable yet active and fast riding position.

400 Series OCLV

Ultra high performance, within reach. The areal weight range and modulus mix of 400 Series OCLV provides an exhilarating sense of acceleration and confident handling.

Upgrade your pedals and love your bike more

Pedals are two of the five touchpoints that connect you with your bike, and even though this bike comes with a pair, upgrading to pedals that boost control and grip will greatly improve your ride. See the pedal guide and find the best pedals for your riding style. We recommend flat pedals for simple versatility.


Fork Carbon, hidden fender mounts, flat mount disc, 100x5mm thru-skew
Wheel Front /
Tire Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700x40mm
Hub Front Formula CL-51 alloy, 100x5mm QR
Hub Rear Formula CL-52 alloy, 135x5mm QR
Rim Bontrager Paradigm, Tubeless Ready, 32-hole, 21mm width, Presta valve
Skewer Front 135x5mm bolt-on
Skewer Rear 169x5mm bolt-on
Shifter Shimano Deore M4100, 10 speed
Rear Derailleur Shimano Deore M5120, long cage
Crank Prowheel alloy, 42T narrow-wide ring, 170mm length
Cassette Shimano Deore M4100, 11-46, 10 speed
Chain KMC X10, 10 speed
Pedal Bontrager City pedals
Saddle Bontrager H1
Seatpost Bontrager alloy, 27.2mm, 12mm offset, 330mm length
Handlebar Bontrager Satellite Plus IsoZone, alloy, 31.8mm, 15mm rise, 600mm width
Stem Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length
Grips Bontrager Satellite IsoZone Plus, lock-on, ergonomic //

Geometry Chart

XSSMLXL
B B Drop 6.5
B B Height 28.5
Chainstay Length 44.2
Eff Top Tube 52.8
Frame Reach 38.3
Frame Size Letter XS
Frame Stack 54.3
Head Angle 70.0°
Head Tube Length 11.5
Offset 5
Seat Tube 35.6
Seat Tube Angle 75.0°
Standover 70.8
Trail 7.4
Wheelbase 104.7
Wheel Size 700c
B B Drop 6.5
B B Height 28.5
Chainstay Length 44.2
Eff Top Tube 54.3
Frame Reach 38.5
Frame Size Letter S
Frame Stack 56.8
Head Angle 70.5°
Head Tube Length 14
Offset 5
Seat Tube 40.6
Seat Tube Angle 74.5°
Standover 75.1
Trail 7.1
Wheelbase 105.4
Wheel Size 700c
B B Drop 6.5
B B Height 28.5
Chainstay Length 44.2
Eff Top Tube 56.3
Frame Reach 39.3
Frame Size Letter M
Frame Stack 59.4
Head Angle 71.0°
Head Tube Length 16.5
Offset 5
Seat Tube 45.7
Seat Tube Angle 74.0°
Standover 78.7
Trail 6.8
Wheelbase 106.5
Wheel Size 700c
B B Drop 6.5
B B Height 28.5
Chainstay Length 44.2
Eff Top Tube 58.3
Frame Reach 40
Frame Size Letter L
Frame Stack 62
Head Angle 71.5°
Head Tube Length 19
Offset 5
Seat Tube 50.8
Seat Tube Angle 73.5°
Standover 81.2
Trail 6.4
Wheelbase 107.5
Wheel Size 700c
B B Drop 6.5
B B Height 28.5
Chainstay Length 44.2
Eff Top Tube 61.3
Frame Reach 41
Frame Size Letter XL
Frame Stack 64.8
Head Angle 72.5°
Head Tube Length 21.5
Offset 5
Seat Tube 55.9
Seat Tube Angle 72.5°
Standover 84.8
Trail 5.8
Wheelbase 108.2
Wheel Size 700c