2024 Polygon Tambora AE GRX

Archived: 2024 Polygon Tambora AE GRX · Electric-assist · Published sizes: S, M, L, XL

• 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: ACX CARBON e-GRAVEL · Fork: CARBON RIGID · Carbon Fiber

• Inspect the frame in bright light, especially the head tube, bottom-bracket area, chainstays and clamped surfaces. Look for cracks, ripples, crushed sections or signs of impact.
• 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: SHIMANO GRX BR-RX820 12-SPEED BRIFTER · Rear derailleur: SHIMANO GRX RD-RX822 12-SPEED · Crankset: FSA CK-220-IS MEGATOOTH SH 44T · Cassette: SHIMANO CS-M8100 XT 12-SPEED 10-51T MICROSPLINE · Chain: SHIMANO CN-M6100 12-SPEED

• 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: SHIMANO GRX HYDRAULIC; Levers: SHIMANO GRX ST-RX820; Rotors: SHIMANO RT-CL800 CENTERLOCK 160MM

• Squeeze each lever firmly. It should feel consistent and return cleanly. Check levers, hoses and calipers for fluid, inspect pad thickness and contamination, and examine rotors for wear or bending.
• 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: Wheels: NOVATEC G24 DISC (28mm) W/ TUBELESS TAPE INSTALLED · Rims: CARBON FV H: 24 622x24 24H FOR TYRE 622-35/68 TLR · Hubs: F: NOVATEC D791 12x100mm 24H CL / R: CL-142 12x142mm 24H CL FOR MICROSPLINE · Front tire: SCHWALBE G-ONE 700C-40 622X40 ALLROUND TIRE TLE ADDIX · Rear tire: SCHWALBE G-ONE 700C-40 622X40 ALLROUND TIRE TLE ADDIX

• Spin both wheels and watch for side-to-side and vertical movement. Check spoke tension, rim condition and hub play. Inspect the carbon rims closely for impact marks, cracks, delamination or damage around spoke holes and bead hooks.
• 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: FSA NO.55R 1.5"/CR/LS, IS 52/28.6 | IS 52/40 · Handlebar: FSA ENERGY SUPER COMPACT, W: 400mm (S-M) 420mm (L-XL), BB: 31.8mm, R/D: 120mm · Stem: VISION NS SMR-II ST, EXT: 90mm (S-M) 100mm (L-XL), BB: 31.8mm, R/D: 10degree · Seatpost: CARBON, DxL: 27.2 x 400mm · Saddle: FIZIK TERRA ARGO, STEEL ø7mm

• 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.

Archived: Motor: BOSCH PERFORMANCE LINE SPRINT BDU3184 · Battery: BOSCH COMPACTTUBE 400 FIXED MOUNT HORIZONTAL

• Inspect the battery case, mount, lock and electrical contacts for cracks, impact, corrosion, swelling, overheating marks or looseness. Confirm the battery charges normally.
• Confirm the correct charger, battery keys and removable system parts are included. Check charger cables and connectors for damage or improvised repairs.
• Power the system on from cold, check the display for warnings, and test every assist mode. Assistance should engage and stop predictably without intermittent cutouts or abnormal motor noise.
• Ask for available battery-health, cycle-count, diagnostic and firmware records. Confirm that replacement batteries and system support remain available before agreeing on value.

• 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.