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  • FX Sport 6
2018

FX Sport 6

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$1,999.99 Model 21563
FX Sport 6 is the lightest and fastest fitness bike in the lineup. It has every performance feature of a high-end road bike, with the added benefit of a flat handlebar for additional comfort and control. A lightweight 400 Series OCLV Carbon frame with a road-smoothing IsoSpeed decoupler, carbon fork, and advanced Shimano drivetrain make it the best choice for serious fitness riders with serious goals.
FX Sport 6 is the lightest and fastest fitness bike in the lineup. It has every performance feature of a high-end road bike, with the added benefit of a flat handlebar for additional comfort and control. A lightweight 400 Series OCLV Carbon frame with a road-smoothing IsoSpeed decoupler, carbon fork, and advanced Shimano drivetrain make it the best choice for serious fitness riders with serious goals.
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It's right for you if...

You want the fastest fitness bike you can get—one that can hold its own with any road bike out there. You want to keep up with faster group rides, put on more miles, set new Strava PRs, and leave a pack of roadies in your dust as you sprint to the town line.

The tech you get

A lightweight 400 Series OCLV Carbon frame with a road-smoothing IsoSpeed decoupler, a carbon fork, an 11-speed Shimano 105 road drivetrain, Tektro hydraulic disc brakes, hidden fender mounts, a carbon fiber Bontrager seatpost, Bontrager Montrose Comp saddle, and a lightweight Bontrager alloy wheelset with thru-axles for better responsiveness and control.

The final word

The fastest fitness bike. Period. A lightweight OCLV Carbon frame with IsoSpeed, carbon fork, and performance Shimano 105 drivetrain make FX Sport 6 the ideal ride for anyone who wants to ride ridiculously fast and crush fitness milestones.

favorite_borderWhy you'll love it

  1. FX Sport 6 is incredibly fast, and it has the added comfort and control of a flat handlebar
  2. Fast is fun: FX Sport 6 is the quickest fitness bike on the road
  3. You can pair FX with your smartphone and send your ride data to your favorite fitness app when you add DuoTrap S
  4. It's easy to accessorize with fenders, lights, and more!

More options

2018
FX Sport 5

FX Sport 5

$1,789.99 

Upgrades from FX S 4

  • OCLV 400 FX S frameset with IsoSpeed
  • Shimano Tiagra 10-speed drivetrain
  • Lightweight 28-spoke wheelset
  • Bontrager Montrose Comp saddle
  • Bontrager AW2 Hard-Case Lite folding tires
2018
FX Sport 5 Women's

FX Sport 5 Women's

$1,789.99 

Upgrades from FX S 4 Women's

  • OCLV 400 FX S frameset with IsoSpeed
  • Shimano Tiagra 10-speed drivetrain
  • Lightweight 28-spoke wheelset
  • Bontrager Ajna 1 WSD saddle
  • Bontrager AW2 Hard-Case Lite folding tires
2018
FX Sport 4

FX Sport 4

$1,149.99 

Upgrades from FX 3

  • Superlight FX S Aluminum fitness frameset with flat mount disc brake
  • 10-speed double road drivetrain
  • Fast-rolling AW1 tires
  • Tektro flat mount hydraulic brakes
2018
FX Sport 4 Women's

FX Sport 4 Women's

$1,149.99 

Upgrades from FX 3 Women's

  • Superlight FX S Aluminum fitness frameset with flat mount disc brake
  • 10-speed double road drivetrain
  • Fast-rolling AW1 tires
  • Tektro flat mount hydraulic brakes
2018
FX 3 Women's

FX 3 Women's

$659.99 

Upgrades from FX 2 Women's

  • Acera 9-speed drivetrain
  • HCM Carbon FX fork
  • IsoZone handlebar and grips
  • H1 fitness saddle
  • Bontrager Hard-Case Lite tires
2018
FX 3

FX 3

$659.99 

Upgrades from FX 2

  • Shimano Alivio 9-speed drivetrain
  • HCM Carbon FX fork
  • IsoZone handlebar and grips
  • H1 fitness saddle
  • Bontrager Hard-Case Lite tires
2018
FX 2

FX 2

$489.99 

Upgrades from FX 1

  • Shimano Acera 8-speed drivetrain
  • Lightweight alloy fork
  • Blendr compatible stem
  • 31.8mm alloy handlebar


Features

Vanishing fender mounts

Discreet mounts accommodate full-coverage fenders for added utility.

Blendr stem

Bontrager stem technology lets you clip your gear directly to the stem for clean looks, maximum user friendliness.
Learn more

IsoZone handlebar and grips

Suspension for your hands. Our exclusive vibration-damping IsoZone material absorbs road bumps and buzz, giving you more control and an incredibly comfortable ride.

Tubeless Ready rims

Bontrager TLR (Tubeless Ready) Road is the first fully integrated tubeless system for the road. No tubes mean there’s no pinch flats, allowing you to run lower tire pressure. With lower tire pressure you can increase traction, control. and comfort, reduce fatigue on you. Best of all, the tire sealant seals up punctures as soon as they happen!

11 speed

The new pinnacle of shifting performance.

Puncture-resistant tires

Tough Bontrager Hard-Case tires help keep flats from slowing you down.

DuoTrap S compatible

DuoTrap S integrates a Bluetooth®/ANT+ sensor into the frame. Log routes and track fitness progress on your computer or smart phone with no external sensor. Works with all major ANT+ wireless players, including Bontrager, Garmin, PowerTap, and SRM.

Carbon fork

Lightweight fork with carbon fiber legs soaks up hand-numbing road vibration.

Internal cable routing

We route shift and brake cables through the frame to keep things clean and simple. And it looks great, too.

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.
Learn more

IsoSpeed decoupler

At the core of Trek's endurance comfort technology is the IsoSpeed decoupler, the result of an 18-month study of how a racing bike performs over rough roads, and how that performance affects the rider.
Learn more

Hydraulic disc brakes

Hydraulic disc brakes offer the absolute strongest stopping power in all conditions, including wet and muddy.

Specifications

  • Frameset

    Frame
    FX Sport 400 series OCLV carbon, IsoSpeed, 3s chain keeper, DuoTrap S compatible, flat mount disc, 12mm thru axle, hidden fender mounts
    Fork
    FX carbon, flat mount disc, hidden fender mounts

  • Wheels

    Front Hub
    Bontrager alloy sealed bearing, 12mm thru axle
    Rear Hub
    Bontrager alloy centerlock, 142x12
    Rims
    Bontrager Tubeless Ready Disc, 28h
    Tires
    Bontrager AW2 Hard-Case Lite, 700x32c, folding

  • Drivetrain

    Shifters
    Shimano RS700, 11 speed
    Front derailleur
    Shimano 105, braze-on
    Rear derailleur
    Shimano 105
    Crank
    Shimano 105, 50/34 (compact)
    Bottom bracket
    Press Fit BB86.5
    Cassette
    Shimano 105, 11-32, 11 speed
    Chain
    Shimano HG-601
    Pedals
    VP nylon body w/alloy cage, toe-clip/strap

  • Components

    Saddle
    Bontrager Montrose Comp
    Seatpost
    Bontrager carbon, 2-bolt head, 27.2mm, 8mm offset
    Handlebar
    Bontrager Satellite Plus IsoZone, 31.8mm, 15mm rise
    Grips
    Bontrager Satellite IsoZone Plus, lock-on, ergonomic
    Stem
    Bontrager Elite, 31.8mm, 7 degree, w/computer & light mounts
    Headset
    1-1/8˝ threadless, sealed cartridge bearings
    Brakeset
    Tektro HD-R310, hydraulic disc

  • Weight

    Weight
    20˝ - 9.99 kg / 22.02 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, and materials.
Bike and frame weights are based off Trek pre-production painted frames at time of publication. Weights may vary in final production.

Sizing & fit

The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local Trek retailer.

 

Rider Height

All measurements provided in cm unless otherwise noted.

Frame size number Frame size letter Wheel size A Seat tube B Seat tube angle C Head tube length D Head angle E Effective top tube F Bottom bracket height G Bottom bracket drop H Chainstay length I Offset J Trail K Wheelbase L Standover M Frame reach N Frame stack
14 in XS 700c 35.6 75.0° 11.0 70.0° 53.1 28.5 6.5 43.8 5.0 74.2 104.5 58.4 38.8 53.3
16 in S 700c 40.6 74.5° 13.5 70.5° 55.0 28.5 6.5 43.8 5.0 70.9 105.6 71.2 39.5 55.8
18 in M 700c 45.7 74.0° 16.0 71.0° 57.0 28.5 6.5 43.8 5.0 67.6 106.7 74.3 40.3 58.4
20 in L 700c 50.8 73.5° 18.5 71.5° 59.0 28.5 6.5 43.8 4.5 69.7 107.2 78.1 40.9 61.1
22 in XL 700c 55.9 72.5° 21.0 72.5° 62.0 28.5 6.5 43.8 4.5 63.2 108.0 81.8 41.9 64.0

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