A Lightweight All-Road Aluminium Hybrid Ready for Paved and Unpaved Paths

The Trek FX Sport AL 3 is a versatile flat-bar bike built on an Alpha Gold Aluminum frame part of Trek's low-emission aluminium transition that began in 2024. By October 2025, this bike had completed the switch to aluminium produced using renewable energy, resulting in a significantly reduced manufacturing carbon footprint for the frame without changing its performance characteristics. Alpha Gold Aluminum sits within Trek's aluminium hierarchy as a lightweight and reliable construction suited to a performance-oriented flat bar platform.

The Active geometry positions the rider in a slightly more forward posture than a purely relaxed hybrid geometry, more pedalling-efficient and more engaged than a comfort-oriented bike, while remaining comfortable over longer rides. This geometry suits riders who want to cover distance efficiently without committing to the aggressive position of a drop-bar road bike. It is the geometry choice of a bike designed to move quickly on both road and trail surfaces.

The bike comes with a set of pedals included. Trek recommends considering a flat pedal upgrade as pedals are one of five contact points between rider and bike, and an appropriate choice can meaningfully improve grip and control for your riding style.

42c Bontrager Girona Gravel Tyres and All-Road Capability

The FX Sport AL 3 is fitted with Bontrager Girona gravel tyres in a 42c width tyre that provides traction and control across both paved and unpaved surfaces. A 42c tyre is significantly wider than a standard road tyre, offering additional cushioning over rough surfaces, improved grip on loose or damp terrain, and more stability on paths and light trails where a narrower road tyre would feel uncertain. The Girona is a gravel-specific tyre designed for mixed-surface riding, making it a direct reflection of the FX Sport AL 3's intended use across varied terrain rather than an afterthought tyre choice.

The combination of the Active geometry, CUES LINKGLIDE drivetrain, hydraulic disc brakes, and 42c gravel tyres creates a flat-bar bike that is genuinely capable across the full range of surfaces a rider is likely to encounter road commuting, coastal paths, gravel tracks, and unpaved rail trails without requiring tyre changes or component swaps for different ride types.

Shimano CUES LINKGLIDE 10-Speed and Hydraulic Disc Brakes

The FX Sport AL 3 uses a Shimano CUES 10-speed drivetrain with LINKGLIDE technology, a system designed for significantly extended drivetrain longevity. LINKGLIDE reduces wear rates on the chain, cassette, and chainrings compared to standard drivetrains, meaning the drivetrain components last longer before requiring replacement and perform consistently throughout their extended service life. For a bike ridden regularly across varied surfaces and conditions, this durability focus reduces the frequency and cost of drivetrain servicing over time.

Shimano CUES is designed to span both electric and standard bikes, representing a platform built for long-term versatility and compatibility. The 10-speed range provides a practical spread of gears for the combination of road riding, gravel paths, and varied gradients this bike is designed to cover.

Hydraulic disc brakes provide powerful, consistent stopping performance across all conditions wet roads, damp gravel, or dry pavement. For a bike designed to venture off smooth tarmac, hydraulic disc braking maintains consistent modulation regardless of rim condition or weather, which is a meaningful advantage over rim brakes when riding surfaces include mud, loose gravel, or wet paths.

A better way to produce aluminum

Starting in 2024, we began removing high-emission aluminum from our manufacturing and replacing it with low-emission aluminum made with renewable energy. By October 2025, nearly every alloy bike we make - this one included - had made the switch, driving a major drop in our footprint.

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.

FAQs

What tyres come fitted on the Trek FX Sport AL 3?

The bike is fitted with Bontrager Girona gravel tyres in a 42c width, designed for traction and control on both paved roads and unpaved surfaces including gravel and light trails.

What drivetrain does the FX Sport AL 3 use?

The bike uses a Shimano CUES 10-speed drivetrain with LINKGLIDE technology. LINKGLIDE is designed for significantly reduced wear on the chain, cassette, and chainrings, extending drivetrain service life compared to standard drivetrains.

What brakes does the FX Sport AL 3 use?

The bike is fitted with hydraulic disc brakes, providing consistent and powerful stopping performance across all weather and surface conditions.

What is the Active geometry on the FX Sport AL 3?

Active geometry positions the rider in a slightly more forward position than a standard hybrid geometry. This improves pedalling efficiency while maintaining comfort on longer rides, a balance suited to riders who want to cover distance at pace without an aggressive race position.

What is the low-emission aluminium used in the FX Sport AL 3?

Starting in 2024, Trek began replacing standard high-emission aluminium in its manufacturing with aluminium produced using renewable energy. By October 2025, the FX Sport AL 3 had completed this transition, resulting in a significantly lower manufacturing carbon footprint for the frame.

Is the FX Sport AL 3 suitable for gravel riding?

Yes. The bike is fitted with 42c Bontrager Girona gravel tyres and hydraulic disc brakes, making it capable on unpaved paths, gravel tracks, and mixed-surface routes as well as paved roads.

Does the FX Sport AL 3 come with pedals?

Yes. The bike comes with a set of pedals included. Trek recommends considering a flat pedal upgrade as pedals are one of five contact points on the bike and the right choice can improve grip and control.

Specs:

Geometry Chart