Trek Check-OUT SL 5 - Dark Star/Dark Web

This adventure-ready full-suspension gravel bike delivers a perfect balance of performance and rugged utility, making it an excellent match for weekend trail exploration, multi-day bikepacking adventures, or a rock-solid daily driver. Equipped with a premium RockShox Rudy XL suspension fork to absorb bumps and trail chatter, this model features an advanced 500 Series OCLV Carbon frame with a RockShox SIDluxe IsoStrut rear shock delivering 55 mm of rear travel, a crisp-shifting 12-speed Shimano GRX drivetrain, and a factory-spec TranzX dropper post for instant on-the-fly saddle adjustments.

Specifications

Frameset & Suspension

• Frame: 500 Series OCLV Carbon, integrated frame bag mounts, custom integrated rack mounts, T47 bottom bracket shell, UDH (Universal Derailleur Hanger), 142x12 mm chamfered thru-axle, 55 mm travel capacity format.

• Fork: RockShox Rudy XL Ultimate, Charger Race Day 2 damper, Solo Air spring, tapered steerer, 45 mm offset, flat-mount disc, 12x100 mm thru-axle, 60 mm travel.

• Rear Shock: RockShox SIDluxe Ultimate 3P (170 mm x 27.5 mm).

Drivetrain & Shifting (Shimano GRX 1x12 Mechanical)

• Shifter: Shimano GRX RX820, 12-speed mechanical.

• Front Derailleur: N/A (1x Dedicated single-ring drivetrain layout).

• Rear Derailleur: Shimano GRX RX822, 51T max cog capacity.

• Cassette: Shimano XT M8200, 10-51, 12-speed wide-range.

• Chain: Shimano XT M8100, 12-speed.

• Bottom Bracket: Praxis, T47 threaded, internal bearing.

• Pedals: Platform pedals sold separately.

• Crankset Configurations (Shimano GRX RX610, 38T single ring):

  • Size S: 165 mm length.

  • Sizes M, ML: 170 mm length.

  • Sizes L, XL: 172.5 mm length.

• Max Chainring Limits: 1x configuration: Maximum 38T | 2x configuration: N/A | 3x configuration: N/A.

Brakes & Rotors

• Brakes: Shimano GRX hydraulic disc system, flat-mount calipers.

• Rotors: Shimano CL800 CenterLock premium design ([Front] 160 mm / [Rear] 160 mm).

• Rotor Size Limits: Frame and fork maximum capacity is 180 mm front and rear.

Wheels & Tyres

• Wheelset System (Bontrager Paradigm Comp 25, Tubeless Ready, 25 mm internal rim width):

  • Front Configuration: Bontrager custom wheel, CenterLock disc interface, 100x12 mm thru axle.

  • Rear Configuration: Bontrager custom wheel, CenterLock disc interface, Shimano Micro Spline freehub body, 142x12 mm thru axle.

• Rear Thru-Axle Skewer: Bontrager Switch chamfered thru axle, with integrated removable lever.

• Tyres: Bontrager Betasso RSL GX, Tubeless Ready, high-performance aramid folding bead, 60 tpi, 700x55 mm.

• Included Tubeless Spares: Bontrager TLR rim strips and Bontrager TLR sealant (180 ml / 6 oz).

• Max Tyre Clearance: Frame limits at 56 mm / 2.20" (as measured, see manual for details).

Cockpit & Components

• Saddle: Verse Short Comp, steel rails, 145 mm width.

• Handlebar Tape: Bontrager Supertack Perf tape.

• Dropper Seatpost Integration (TranzX JD-YSI36 high-performance dropper system):

  • All Frame Sizes: 31.6 mm diameter, 328 mm total length, internal routing, 100 mm travel.

• Handlebars standard by Size (Bontrager GR Checkout):

  • Size S: 42 cm width.

  • Size M: 44 cm width.

  • Sizes ML, L: 46 cm width.

  • Size XL: 48 cm width.

• Stem Geometry by Size (Bontrager Elite, 31.8 mm clamp, 7-degree rise):

  • Sizes S, M: 60 mm length (Blendr compatible).

  • Sizes ML, L: 70 mm length (Blendr compatible).

  • Size XL: 80 mm length (Blendr compatible).

Sizing, Weight & Performance Limits

• Alpha Sizes Available: S, M, ML, L, XL.

• Total Bike Weight: 11.97 kg / 26.39 lb (Size ML configuration setup with factory TLR sealant, no inner tubes, excluding rear rack).

• Weight Limit: This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 125 kg (275 lb).

Included Accessories

• Rear Storage System: Checkout heavy-duty rear utility rack.

• Mounting Infrastructure: Trek Adjustable Multi-Mount bracket system.

Please Note: We make every effort to ensure the accuracy of the specification information, but components are subject to change by the manufacturer at any time without prior notice due to ongoing factory running parts substitutions. Bike and frame weights are based on pre-production painted frames at time of publication; production variances may occur.