2027 Trek Domane AL 2 Gen 4

Archived: 2027 Trek Domane AL 2 Gen 4 · Road · Published sizes: 44; 49; 52; 54; 56; 58; 61

• Confirm the frame markings and seller description match this archived model. Note every component that differs from the published build.
• Record the frame serial number. It should be legible, unaltered and consistent with the seller’s ownership history.
• Find the size marking on the bicycle and confirm the fit before judging the condition or price.

Archived: Frame: 100 Series Alpha Aluminum, tapered head tube, internal routing, fender mounts, flat mount disc, UDH, 142x12mm thru axle · Fork: Domane AL carbon, tapered carbon steerer, internal brake routing, fender mounts, flat mount disc, 12x100mm thru axle · Carbon fiber

• Look for dents or shape changes and inspect the edges of welds around the head tube, bottom bracket, seat cluster and suspension mounts for hairline cracks.
• Stand behind and in front of the bicycle to look for obvious frame, fork or wheel misalignment. Ask directly about crashes, transport damage and repairs.
• Inspect the fork crown, blades, dropouts and visible steerer area. Check that it is straight, securely installed and free of cracks or impact damage.

Archived: Shifters: 44, 49, 52, 54, 56, 58, 61: Shimano Claris ST-R2000-L, 8 speed, left / 44, 49, 52, 54, 56, 58, 61: Shimano Claris ST-R2000-R, 8 speed, right · Front derailleur: Shimano Claris R2000, FD-R2000, 8-speed, 31.8mm clamp · Rear derailleur: Shimano Claris RD-R2000, long cage, 34T max cog · Crankset: 44, 49, 52, 54, 56: Shimano RS200, 50/34 (compact), 165mm length / 58, 61: Shimano RS200, 50/34 (compact), 175mm length · Bottom bracket: Shimano UN30, 68mm, threaded cartridge, 110mm spindle · Cassette: Shiman…

• Shift through every available gear under light load. Hesitation, skipping or inconsistent indexing can reflect wear, damage, poor adjustment or mismatched replacement parts.
• Measure chain wear with a compatible gauge and inspect chainring, cassette or freewheel teeth. A new chain does not rule out wear in the remaining drivetrain.
• Turn the cranks slowly, feel for rough bearings and check for side-to-side play. Inspect crank arms, chainring bolts and pedal threads for looseness or damage.

Archived: Brakes: Tektro C550 mechanical disc brake, dual piston, flat mount

• Check both cables and housings for corrosion, fraying or drag. Confirm each caliper releases cleanly, then inspect pad thickness, rotor wear and rotor alignment.
• Before riding, test every installed brake separately at walking speed. Each should stop firmly and release cleanly without its control reaching the end of its usable travel.

Archived: Wheel size: 700c · Rims: Bontrager Paradigm 23, Tubeless Ready, 24-hole, 23mm width, Presta valve · Hubs: (F) Formula RX-512 alloy, 6-bolt, 100x12mm thru axle / (R) Formula RX-142 alloy, 6-bolt, Shimano 11-speed freehub, 142x12mm thru axle · Front tire: Bontrager Kwaremont Comp, Hard-Case Lite, wire bead, 60 tpi, 700x32mm · Rear tire: Bontrager Kwaremont Comp, Hard-Case Lite, wire bead, 60 tpi, 700x32mm

• Spin both wheels and watch for side-to-side and vertical movement. Check spoke tension, rim condition and hub play.
• Inspect both tire casings for cuts, cracking, plugs, bulges or exposed threads and confirm the installed sizes are safe for the rims and available frame and fork clearance.
• Remove and reinstall or closely inspect both wheel-retention systems. Axles or quick releases should tighten correctly with undamaged threads, hardware and dropouts.
• Confirm whether the bike is actually set up tubeless, whether both tires hold pressure, and when sealant and rim tape were last serviced.

Archived: Headset: Bontrager Headset Expander Plug and Top Cap · Seatpost: 44, 49: Bontrager Comp, 6061 alloy, 27.2mm, 8mm offset, 250mm length / 52, 54, 56, 58, 61: Bontrager Comp, 6061 alloy, 27.2mm, 8mm offset, 330mm length · Saddle: Verse Short Comp, steel rails, 145mm width

• Apply the front brake and rock the bike to check for headset play or notchiness. Inspect the stem, handlebar and clamp zones, then confirm every fastener and control is secure.
• Check that the seatpost moves for adjustment and that the saddle, post and clamp hold securely without cracks, severe corrosion or damaged hardware.

• Before riding, confirm both wheels are secure, tires are safe, both brakes function, and the headset, handlebar, stem, cranks and pedals have no looseness.
• Begin at low speed. Test steering, braking and shifting progressively, then load the drivetrain and suspension only after the basic safety checks pass.
• Listen and feel for repeated knocks, grinding, skipping, brake pulsation or movement at joints. Stop the test if the bicycle cannot be controlled safely.