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It's right for you if...
You've got goals to demolish and you need a bike that can help you finish a 50-mile ride charity ride, your first sprint triathlon, your daily commute or any other fitness milestone. You want a performance hybrid that's comfortable on longer rides with big hills and versatile enough to carry the shopping home after your workout.
The tech you get
A lightweight aluminium frame, a carbon fork that absorbs road vibration, hydraulic disc brakes for all-weather stopping power, a Shimano Deore 1x11 drive train with a wide range of gears for hilly routes, rack and hidden mudguard mounts, fast-rolling Bontrager tyres, IsoZone ergonomic grips and compatibility with DuoTrap S, so you can track your fitness gains.
The final word
If you have fitness goals, the FX 4 will help you cruise past them. It's the perfect combination of road bike speed and hybrid bike versatility: comfortable over the long haul, quick when you want to put the hammer down and reliable in all weather conditions and on a variety of road surfaces.
The Walkthrough
favorite_borderWhy you'll love it
- The 1x drive train delivers a wide range of gearing with the simplicity of a single shifter
- 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 do the weekly shop
- It's easy to accessorise with racks, a kickstand, mudguards, lights and more!
- You can pair FX with your smartphone and send your ride data to your favourite fitness app when you add DuoTrap S
- You can pair FX with your smartphone and send your ride data to your favourite fitness app when you add DuoTrap S
How to: Pump your tyres
Setting your bike's tyre pressure correctly will give you a more comfortable ride with better grip and handling. Even better, it can help prevent flats
Watch the video
How to: Fix a flat tyre
Flat? Fixed. Our simple how-to video will show you how to get back on two wheels in no time flat.
Watch the video
How to: Wash your bike
A clean bike is a happy bike, but washing your ride is a bit more complicated than a quick spray with the hose or a joyride through your local car wash. Follow our step-by-step process and you’ll learn the dos and don’ts of keeping your bike in tip-top shape!
Watch the video
How to: Remove and install wheels
From transporting on a rack to fixing a flat, sometimes those wheels need to come off your bike. Keep watching to learn how to safely remove and install wheels that use a quick-release system.
Watch the videoFeatures
1x drive train
A 1x11 drivetrain means more versatility, simpler shifting and fewer 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.
Alpha Gold Aluminium frame
Our high-performance lightweight aluminium is continuously cold extruded and butted, and formed into manipulated tube shapes to balance strength and save weight.
Hydraulic disc brakes
Hydraulic disc brakes offer the absolute strongest stopping power even in wet and muddy conditions.
Carbon fork
Lightweight fork with carbon fibre legs soaks up hand-numbing road vibration.
Tubeless Ready rims
Bontrager TLR (Tubeless Ready) Road is the first fully integrated tubeless system for road wheels. When you go tubeless with TLR, you can run lower tyre pressure for increased traction and comfort without the threat of pinch flats.
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.
Blendr stem
Bontrager stem technology lets you clip your gear directly to the stem for clean looks and maximum user friendliness.
Learn more
Internal cable routing
We route shift and brake cables through the frame to keep things clean and simple. And it looks great, too.
Rack & mudguard ready
Built-in mounts make it easy to add racks and mudguards for added versatility.
DuoTrap S compatible
DuoTrap S has a Bluetooth®/ANT+ sensor integrated 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.
Specifications
*spec applies to all sizes unless otherwise noted
| Frame | Alpha Gold Aluminium, DuoTrap S-compatible, internal cable routing, flat-mount disc, rack and mudguard mounts, 135x5 mm QR |
|---|---|
| Fork | FX Carbon, rack and mudguard mounts, flat-mount disc, 405 mm axle-to-crown. ThruSkew 5 mm QR |
| Hub front | Formula DC-20, alloy, 6-bolt, 5x100 mm QR |
|---|---|
| Hub rear | Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5 mm QR |
| Rim | Bontrager Affinity Disc, Tubeless Ready, 32-hole, 21 mm width, presta valve |
| Spokes | 14 g stainless steel, black |
| Tyre | Bontrager H2 Comp, wire bead, 30 tpi, 700x32c |
| Shifter | Shimano Deore M5100, 11-speed |
|---|---|
| Rear derailleur | Shimano Deore M5100, long cage, Shadow Plus |
| Crank | ProWheel alloy, 42T, 175 mm |
| Cassette | Shimano Deore M5100, 11-51, 11-speed |
| Pedal | Bontrager Satellite City pedal |
| Saddle | Bontrager H1 |
|---|---|
| Seatpost | Bontrager alloy, 27.2 mm, 12 mm offset, 330 mm length |
| *Handlebar |
Size:
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:
S Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 90 mm length |
|
Size:
M, L Bontrager Elite, 31.8 mm clamp, Blendr-compatible, 7-degree, 100 mm length |
|
|
Size:
XL, XXL Bontrager Elite, 31.8 mm clamp, Blendr-compatible, 7-degree, 110 mm length |
|
| Head set | 1-1/8" threadless, sealed cartridge bearings |
| Brake | Shimano MT201 hydraulic disc, flat-mount, 160 mm rotor |
| Brake rotor | Shimano RT26, 160 mm, 6-bolt |
| Weight | M - 11.52 kg / 25.4 lbs |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb). |
Sizing & fit
Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorised Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.
Rider Height
Inseam
XS
147.0 - 155.0 cm
4'9.9" - 5'1.0"
69.0 - 73.0 cm
27.2" - 28.7"
S
155.0 - 165.0 cm
5'1.0" - 5'5.0"
72.0 - 78.0 cm
28.3" - 30.7"
M
165.0 - 175.0 cm
5'5.0" - 5'8.9"
77.0 - 83.0 cm
30.3" - 32.7"
L
175.0 - 186.0 cm
5'8.9" - 6'1.2"
82.0 - 88.0 cm
32.3" - 34.6"
XL
186.0 - 197.0 cm
6'1.2" - 6'5.6"
87.0 - 93.0 cm
34.3" - 36.6"
All measurements provided in cm unless otherwise stated.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S | 700c | 38.1 | 74.5° | 11.5 | 70.5° | 54.2 | 29.6 | 6.5 | 45 | 5.0 | 7.5 | 105.9 | 70.4 | 39.3 | 53.9 |
| M | 700c | 44.5 | 74.0° | 13.0 | 71.5° | 55.7 | 29.6 | 6.5 | 45 | 5.0 | 6.8 | 106.0 | 73.8 | 39.7 | 55.7 |
| L | 700c | 50.8 | 73.5° | 16.0 | 71.5° | 57.1 | 29.6 | 6.5 | 45.0 | 5.0 | 6.8 | 107.0 | 79.9 | 39.8 | 58.6 |
| XL | 700c | 57.2 | 73.0° | 19.0 | 72.5° | 58.7 | 29.6 | 6.5 | 45.0 | 5.0 | 6.2 | 107.0 | 84.8 | 39.8 | 61.8 |
| XXL | 700c | 63.5 | 72.0° | 22.0 | 72.5° | 60.1 | 29.6 | 6.5 | 45.0 | 5.0 | 6.2 | 107.2 | 88.5 | 39.2 | 64.7 |