Marin 2025 Alcatraz Jr 24

Marin 2025 Alcatraz Jr 24

We've taken the Alcatraz 1 and scaled it down for smaller riders. Built upon the same tubing as the larger models, it features a 360mm reach, 69° headtube angle, and 72° seattube angle, with 369mm chainstays. A suspension-corrected rigid CrMo fork is designed to handle rough-and-rowdy riding, and a simple and stout single-speed drivetrain and Tektro mechanical disc brakes ensure a fun and safe ride.

Specifications

Marin 2025 Alcatraz Jr 24

Frame

Colour: Orange Yellow Fade
Frame: Series 3 6061 Aluminum, 24” Wheels, 135x10mm Horizontal Single Speed Dropouts, 73mm Threaded BB, ISCG 05 Tabs
Fork: Marin Series 2 CroMo 24", Suspension Corrected, 100x9mm Dropouts
Shock:

Drivetrain

Crankset: Marin Forged Alloy, Alloy 32T DM Chainring, 155mm Length
Chain: KMC HL-1
Bottom Bracket: Sealed Cartridge Bearings, Square Taper
Rear Derailleur:
Front Derailleur:
Derailleur Shifter:
Freewheel/Cassette: 14T Single Speed Cog

Braking System

Brakes: [F] and [R] Tektro MD-M280 Mechanical Disc 160mm Rotor
Brake Levers: Tektro CL-330TS Alloy

Wheels

Tyres: [F] and [R] Vee Tire, Rail 24x2.25”, LSG Compound, Wire Bead
Wheels/Rims: Marin Custom Extrusion, 27mm Inner, Pinned Joint
Hubs: [F] Forged Alloy, Bolt On 3/8" Axle, 100mm Spacing [R] Forged Alloy, 135x10mm, Bolt-On, Quad Sealed Bearings, Disc, 32H

Other

Handlebar: Marin Riser, 6061 Double Butted Aluminum, 31.8mm at center bulge, 38mm Rise, 700mm Width, 4º Up, 9º Back
Stem: Marin 3D Forged Alloy, 31.8mm clamp, 35mm extension
Saddle: Marin DJ Saddle
Seat Post: Marin Alloy, 30.9mm

Velo City does not carry all goods available for purchase online. Time for collection may vary depending if the products are required to be sourced from off-site warehouses. The process can take a few days (normally anywhere between 2-10 working days). If you are worried about a delay please feel free to email or call us.

Free Shipping for orders over $150. *this excludes bikes, bulky items & rural deliveries. Items classified as bulky items or a rural delivery do incur a fee, as specified in the shipping section at checkout.

Due to international policy, all bikes purchased online must be shipped to an approved bike store for professional assembly by a qualified bike mechanic—they cannot be delivered directly to your address.

If you're interested in a bike, contact us and we'll help arrange delivery to a participating store near you.

Please note that delivery to another store will incur freight and assembly charges. Any applicable costs will be confirmed with you by our online team before your order is shipped.

All products are covered by manufacturers warranty. If you do need to send items back to us please make sure that you have read our returns policy.