2025 Polygon Urbano 3

Archived: 2025 Polygon Urbano 3 · Folding · Published sizes: ALL SIZE

• 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: ALX FOLDABLE · Fork: STEEL RIGID FORK · 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: Shifters: SHIMANO RV100, 1X7-SPEED, REVO SHIFTER · Rear derailleur: SHIMANO RD-TZ31 · Crankset: PROWHEEL PRO-552PP 52T · Bottom bracket: CARTRIDGE BEARING W/ CAGED BEARING & 68mm BB SHELL · Cassette: STEEL FREEWHEEL CASSETTE 14-28T · Chain: MEILE M-70

• 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 MECHANICAL DISC BRAKE; Levers: TEKTRO CL-330TS; Rotors: 160mm, 6-BOLTS

• 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: Wheels: ALLOY DOUBLE WALL, 32H · Rims: F: ALLOY DOUBLE WALL H: 20mm W: 21mm 32H FOR TYRE 406-20, R: ALLOY DOUBLE WALL H: 20mm W: 21mm 32H FOR TYRE 406-20/35 · Hubs: F: ALLOY NUT 9x100mm 32H, R: NUT 9x135mm 32H · Front tire: KENDA K-154 20"X1.75" · Rear tire: KENDA K-154 20"X1.75"

• 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: BLACK SIZES (CT) : ALL SIZE RAIL : STEEL ø7mm · Handlebar: ALLOY FLAT HANDLEBAR, W: 560mm, BB: 25.4mm, R/D: 0mm, B: 6degree · Stem: FOLDABLE ALLOY, E: 308 - 430mm, BB: 25.4mm · Seatpost: ALLOY SEATPOST, DxL: 33.9 x 580mm · Saddle: BLACK, R : STEEL ø7mm · Pedals: FOLDABLE PP CAGE W/ REFLECTOR

• 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.