2026 Marin Alcatraz JR. 24'

Archived: Frame: Series 3 6061 Aluminum, 24” Wheels, 135x10mm Horizontal Dropouts, 73mm Threaded BB, ISCG 05 Tabs · Fork: Marin Series 2 Cro-Mo 24" 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.

Archived: Fork: Marin Series 2 Cro-Mo 24" 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 DM Chainring, 152mm 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: (R) Tektro HD-M280, Hydraulic Disc, 160mm Rotor; Levers: Tektro HD-M280 (Rear only)

• 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: Wheel size: 24" · Rims: Marin Custom Extrusion, 27mm Inner, Pinned Joint · Hubs: (F) Forged Alloy, Bolt On 3/8t" Axle, 100mm Spacing / (R) Forged Alloy, 135x10mm, Bolt-On, Quad Sealed Bearings, Disc, 32H · Front tire: Vee Tire, Rail 24x2.25”, LSG Compound, Wire Bead · Rear tire: Vee Tire, Rail 24x2.25”, 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.

Archived: Headset: FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8" x 1 1/2” · Handlebar: Marin Riser, 6061 Double Butted Aluminum, 30mm Rise, 700mm Width, 4º Up, 9º Back · Stem: Marin 3D Forged Alloy, 35mm · 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.