Trek FX Sport AL 3
Trek / Active & Fitness Bikes
Fitness, errands, and everything in between.
FX Sport AL 3 is a lightweight hybrid bike built for riders who want to move smoothly between pavement and light gravel. Its lightweight Alpha Gold Aluminum frame and carbon fork keep the ride quick and efficient, while wide Bontrager Girona gravel tires add confidence when the pavement ends. A 10-speed Shimano CUES drivetrain and hydraulic disc brakes round things out with smooth shifting and reliable stopping power wherever the ride takes you.
Based on the bike's size chart. Your complimentary baseline fit in store dials in the rest.
Ship to store · free pickup, usually ready in 4–7 business days
Questions are welcome. No pressure, no bike jargon required.
The ride, not just the specs
FX is the bike we recommend for getting fit, running errands, and riding just because. It's light, comfortable, and easy to ride.
Whether it's a morning loop or a ride to the coffee shop, it makes it easy to get out the door.
What makes it special
A slightly shorter reach and taller stack put you in a more upright, balanced position for smooth power and all-day rideability.
Wide 42c Girona tires offer traction and control on paved or unpaved paths.
The Shimano CUES drivetrain offers a hassle-free, low-maintenance performance riders can rely on for the long haul. CUES features Shimano’s new LINKGLIDE drivetrain technology for less wear and tear on chains, cassettes, and chainrings.
For the detail-oriented
Tap any group to see every part.
Measurements in cm unless noted.
| Size | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Rider height | 4'10"–5'1" | 5'1"–5'5" | 5'5"–5'9" | 5'9"–6'1" | 6'1"–6'6" |
| Seat tube (A on the drawing) | 33.0 | 37.5 | 42.0 | 46.5 | 52.0 |
| Seat tube angle (B on the drawing) | 75.0° | 74.5° | 74.0° | 73.5° | 72.5° |
| Head tube length (C on the drawing) | 11.5 | 14.0 | 16.5 | 19.0 | 21.5 |
| Head tube angle (D on the drawing) | 70.0° | 70.5° | 71.0° | 71.5° | 72.5° |
| Eff. top tube (E on the drawing) | 52.8 | 54.3 | 56.3 | 58.3 | 61.3 |
| BB height (F on the drawing) | 28.5 | 28.5 | 28.5 | 28.5 | 28.5 |
| BB drop (G on the drawing) | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 |
| Chainstay length (H on the drawing) | 44.7 | 44.7 | 44.7 | 44.7 | 44.7 |
| Offset (I on the drawing) | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 |
| Trail (J on the drawing) | 7.4 | 7.1 | 6.8 | 6.4 | 5.8 |
| Wheelbase (K on the drawing) | 105.2 | 105.9 | 107.0 | 108.0 | 108.7 |
| Standover (L on the drawing) | 67.5 | 71.5 | 75.4 | 79.1 | 83.6 |
| Reach (M on the drawing) | 38.3 | 38.5 | 39.3 | 39.9 | 40.9 |
| Stack (N on the drawing) | 54.3 | 56.8 | 59.4 | 62.0 | 64.8 |
| Frame size | 40 | 45 | 50 | 55 | 60 |
| Wheel size | 700c | 700c | 700c | 700c | 700c |
The Atlanta Cycling difference
Specs matter. But so does how a bike feels when you ride it. Our team is here to help you choose the right size, understand the details, and get comfortable before your first ride.
When you buy from Atlanta Cycling, you're not just getting a box with a bicycle in it. You're getting a 30-day money-back guarantee, a complimentary baseline fit, lifetime basic adjustments, and real people who want you to love every mile.
Four neighborhood stores. One shared passion.
Ansley. Alpharetta. Roswell. Vinings. Stop by, take a test ride, ask questions, and meet the people who will be here long after your first ride.
