2021 Polygon Xtrada 7

Archived: Frame: ALX XC TRAIL · Fork: SR SUNTOUR XCR32 AIR LOR 120mm (27.5" & 29") TRAVEL

• 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.

Archived: Fork: SR SUNTOUR XCR32 AIR LOR 120mm (27.5" & 29") TRAVEL

• Inspect the fork stanchions for scratches or coating wear, look for oil or dirt rings at the seals, and cycle the fork through its travel while checking for binding or bushing play.
• Ask for dated fork-service records. A clean exterior does not establish the condition of internal seals, oil or bushings.

Archived: Shifters: SHIMANO DEORE SL-M6100-R, 1x12-SPEED TRIGGER · Rear derailleur: SHIMANO DEORE RD-M6100-SGS DIRECT ATTACH · Crankset: SHIMANO DEORE FC-M6120 1x12 SP · Bottom bracket: SHIMANO 2-PIECE CRANKSET BSA THREADED 73mm · Cassette: 12 SPEED, 10-51T · Chain: KMC X-12

• 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 MT-201 HYDRAULIC DISC BRAKES; Levers: SHIMANO BL-MT201 HYDRAULIC DISC BRAKES; Rotors: SHIMANO SM-RT10 160mm CENTER-LOCK

• 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.

Archived: Wheels: ALLOY WHEELS · Rims: ALLOY DOUBLE WALL H:23mm W: 30mm 584 32H FOR TYRE 584-68/622-68 · Front tire: PERFORMANCE TIRE 27.5"X2.25" / 29"X2.25" · Rear tire: PERFORMANCE TIRE 27.5"X2.25" / 29"X2.25"

• 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. This record indicates different front and rear wheel diameters, so verify each tire at its correct end.

Archived: Headset: ZERO STACK (ZS) SEALED BEARING FOR TAPER HEAD TUBE, ZS 44/28.6 | ZS 56/40 · Handlebar: POLYGON XPERT ALLOY, W: 760mm, BAR BORE: 31.8mm, RISE/DROP: 12mm, BEND: 6degree · Stem: POLYGON XPERT ALLOY, EXT: 40mm, BAR BORE: 31.8mm, RISE/DROP: 7degree · Seatpost: POLYGON XPERT ALLOY, DXL: 27.2 x 350mm, SEAT CLAMP: 31.8mm W/ QR · Saddle: POLYGON, STEEL ø 7mm · Pedals: PP FLAT PEDAL 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.