2021 Jamis XR20

Archived: 2021 Jamis XR20 · Youth · Published sizes: 11″ B

• 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: Enduro frame design, 6061 aluminum tubes, tapered/ ovalized top tube, down tube & stays · Fork: Unicrown, hi-tensile steel, 28.6 steerer · Steel

• 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: Group: Shimano TY300 rear with protective guard · Shifters: Shimano RevoShift 35, 6-speed · Rear derailleur: Shimano TY300 rear with protective guard · Crankset: Forged alloy crank, 127mm, with 36T chainring and protective double-sided chainguard · Bottom bracket: Sealed cartridge · Cassette: 6-speed, 14-28T · Chain: KMC Z33

• 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: Alloy linear pull type with Tektro youth specific levers

• Inspect pads, cables and housings, then examine both rim braking surfaces for concavity, cracking or heavy wear. Confirm each caliper returns and centers correctly.
• 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: 20 · Wheels: Alloy 36H black anodized rims with brushed brake tracks, alloy MTB hubs with nutted axles, 14G black electroplated spokes · Front tire: CST MTB, 20 x 1.95” · Rear tire: CST MTB, 20 x 1.95”

• 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: Aheadset, 1 1/8” · Handlebar: MTB alloy riser, 6 ̊ sweep x 20mm rise x 560mm wide · Stem: MTB alloy threadless, 15 ̊ rise x 60mm extension · Seatpost: Alloy pillar, 27.2 x 300mm, with 31.8mm alloy clamp · Saddle: Jamis ATB Youth · Pedals: MTB platform, hi-impact resin

• 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.