2011 Trek Jet 20

Archived: 2011 Trek Jet 20 · Juvenile · Published sizes: 20" Dialed frame

• 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: TIG-welded · Fork: Trek · High Tensile Steel, unicrown crown

• Check paint damage, vent holes and accessible internal surfaces for corrosion. Look for dents, bent tubes and cracking around welded or brazed joints.
• 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: Group: Juvenile Mix · Crankset: Dialed 4.5", 32 teeth · Cassette: Cog · Rear cogs: 1-speed, 19 teeth

• Check chain tension and chainline, rotate the drivetrain through a full revolution and confirm the rear axle or tensioning hardware cannot slip.
• 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: Wheel size: 20" wheels · Rims: Alloy, 36-hole · Hubs: Steel · Front tire: 20 x 1.95" Cross Knobby

• 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.

Archived: Headset: Adjustable ball bearing · Handlebar: Dialed 20" · Stem: Dialed · Seatpost: Steel · Saddle: Dialed 20" · Pedals: Dialed 20" platform

• 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.

• This record explicitly describes a bicycle without installed brakes. Do not test it on public roads or anywhere a safe stopping method and controlled riding environment have not been established.
• Before a qualified rider begins at low speed, confirm both wheels are secure, tires are safe, and the headset, handlebar, stem, cranks and pedals have no looseness.
• Listen and feel for repeated knocks, grinding, skipping or movement at joints. Stop the test immediately if the bicycle cannot be controlled safely.