Trek FX 3 Gen 4 - Lunar Silver

The FX 3 is a premium fitness hybrid built for riders who demand speed, versatility, and a ride that feels fast from the first pedal stroke. Combining the lightweight agility of a road bike with the confident, upright control of a flat handlebar, it features a sleek Alpha Gold Aluminium frame paired with a vibration-dampening carbon fork. Outfitted with the highly durable 1x10 Shimano CUES Linkglide drivetrain and predictable hydraulic disc brakes, it is fully optimized for efficient daily commuting, fitness miles after work, or exploring local rail trails on the weekend.

Specifications

Frameset & Geometry

• Frame: Alpha Gold Aluminium, internal cable routing, clean flat-mount disc brake interface, integrated kickstand mount, 135x5mm quick-release dropout. Fully equipped with dedicated rack and mudguard (fender) mounts.

• Fork: FX Carbon, flat-mount disc, lowrider rack mounts, 410mm axle-to-crown height, secure ThruSkew 5mm bolt-on quick-release system.

• Frame Clearance: High-volume compatibility up to 700x40mm maximum tyre size (without mudguards).

Drivetrain & Shifting (Shimano CUES 1x10 Linkglide)

• Shifter: Shimano CUES (U6000) 10-speed mechanical shifter featuring an integrated optical gear display.

• Rear Derailleur: Shimano CUES (U6000 GS) 10-speed medium-cage layout.

• Cassette: Shimano CUES (LG300) Linkglide, 10-speed, wide-range 11-48T ratio profile.

• Chain: Shimano LG500 high-durability Linkglide chain.

• Crankset: Prowheel alloy arm, 40T narrow-wide chainring for optimal chain retention.

  • Crank Length by Size: XS, S, M: 170mm length | L, XL: 175mm length.

• Drivetrain Tuning Limits: Maximum 1x chainring limit: 44T | Maximum 2x chainring limit: 46/32T.

• Pedals: Bontrager City platform pedals.

Brakes & Control

• Braking System: Shimano hydraulic disc brake assembly (UR300 flat-mount calipers paired with MT201 comfort-fit alloy levers).

• Rotors: Shimano RT26 6-bolt steel disc rotors; 160mm front / 160mm rear (160mm is the maximum permitted frame/fork rotor dimension).

Wheels & Tyres

• Rims: Bontrager Tubeless Ready (TLR) Disc, 32-hole, drilled for Presta valve.

• Front Hub: Formula DC-20 alloy shell, 6-bolt rotor mount, 100x5mm spacing with a 139mm bolt-on skewer.

• Rear Hub: Formula DC-22 alloy shell, 6-bolt rotor mount, Shimano 8/9/10-speed freehub body standard, 135x5mm spacing with a 152mm quick-release skewer.

• Tyres: Bontrager H2 Comp, wire bead, 30 TPI casing, 700x35mm fast-rolling pavement profile.

Cockpit & Finishing Kit

• Handlebars: Bontrager Comp Lowriser alloy handlebar, 31.8mm clamp diameter, stable 15mm rise.

  • Width by Size: XS, S, M: 600mm width | L, XL: 660mm width.

• Grips: Trek Ergonomic PRO, secure lock-on design.

• Stem: Bontrager Comp, 31.8mm clamp, 7-degree rise, integrated Blendr accessory integration architecture.

  • Length by Size: XS, S: 90mm extension | M, L, XL: 100mm extension.

• Seatpost: Bontrager alloy micro-adjust post, 27.2mm diameter, comfortable 12mm offset.

  • Length by Size: XS, S, M: 330mm length | L, XL: 400mm length.

• Saddle: Bontrager H1 fitness-optimized ergonomics.

Weight & Structural Limits

• Base Build Weight: 11.65 kg / 25.69 lbs (Measured on a Size Medium frame configuration).

• Maximum Weight Capacity: Structural weight limit of 136 kg / 300 lbs total combined mass (includes the combined weight of the bicycle, rider, and all mounted cargo or racks).

Please Note: Components and frame specifications are subject to running factory parts substitutions by the manufacturer based on availability. Final retail build weights can vary across frame sizing, paint finishes, and protective hardware outfitting.