2025 Marin Alcatraz 1

Archived: 2025 Marin Alcatraz 1 · Specialty · Published sizes: Short, Long

• 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: Series 3 6061 Aluminum, 26” Wheels, 135x10mm Horizontal Dropouts, 73mm Threaded BB, ISCG 05 Tabs · Fork: Marin Series 2 Cro-Mo 26" Fork, Suspension Corrected, 100x9mm Drop Outs · 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.

Archived: Fork: Marin Series 2 Cro-Mo 26" Fork, Suspension Corrected, 100x9mm Drop Outs

• 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: Crankset: Marin Forged Alloy, Alloy 32T Chainring, 104mm BCD, 170mm Crank Length · Bottom bracket: External Sealed Cartridge Bearings · Cassette: 14T Single Speed Cog · Chain: KMC HL-1

• 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: Brakes: (F) Tektro MD-M280 Mechanical Disc 160mm Rotor / (R) Tektro MD-M280 Mechanical Disc 160mm Rotor; Levers: Tektro CL-330TS Alloy

• 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: Wheel size: 26" · Rims: Marin Custom Extrusion, 27mm Inner, Pinned Joint · Hubs: (F) Forged Alloy, Bolt On 3/8th Axle, 100mm Spacing / (R) Forged Alloy, 135x1mm, Bolt-On, Quad Sealed Bearings, Disc, 32H · Front tire: Vee Tire, XCV 26x2.25”, LSG Compound, Wire Bead · Rear tire: Vee Tire, XCV 26x2.25”, LSG Compound, Wire Bead

• 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: FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8" x 1 1/2” · Handlebar: Marin Riser, 661 Double Butted Aluminum, 38mm Rise, 75mm Width, 4º Up, 9º Back · Stem: Marin 3D Forged Alloy, 4mm · Seatpost: Marin Alloy, 30.9mm · Saddle: Marin DJ Saddle · Pedals: Alloy 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.

• 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.