Same DNA. Smaller Size. Ready to Rip.

You asked for it, and Marin delivered: the Alcatraz JR brings the dirt-jump fury of the full-size Alcatraz into a 24-inch wheel format for younger shredders ready to hit the pump track, dirt jumps, and skatepark lines with big energy.

Built using the same Series 3 aluminum frame as the Alcatraz 1, this thing isn’t just “kid friendly”—it’s kid savage. From the geometry to the components, every detail has been refined to keep smaller riders confident, dialed, and in control.

This isn’t just a mini version. It’s a full-send machine, scaled for the next generation of senders.

💥 What Makes It Junior... and Genius

• ⚙️ Series 3 Butted Aluminum Frame – Lightweight and bombproof, just like the full-size

• 📏 360mm Reach / 69° HTA / 369mm Chainstays – Perfect proportions for growing rippers

• 🦾 Rigid CrMo Fork – Suspension-corrected to preserve dialed DJ geometry

• 🔁 Ambidextrous Internal Cable Routing – Clean cockpit, left or right brake setup

• 🛞 Vee Rail 2.25” Tires – All-around traction for dirt, street, or park

• 🔒 Tektro Disc Brakes Front & Rear – Stopping power that matches the send power

🛠 Spec Breakdown

Frame & Fork:

• Frame: Series 3 6061 Aluminum, horizontal dropouts, ISCG 05 tabs

• Fork: Marin Series 2 CroMo rigid, suspension-corrected

Drivetrain:

• Crankset: Marin Forged Alloy, 32T Chainring, 155mm arms

• Bottom Bracket: External Sealed Cartridge

• Cassette: 14T Single Speed Cog

• Chain: KMC HL-1

Brakes:

• Front & Rear: Tektro MD-M280 Mechanical Disc, 160mm rotors

• Levers: Tektro CL-330TS Alloy

Wheels & Tires:

• Rims: Marin Custom 27mm inner width

• Hubs: Forged Alloy, sealed bearings, bolt-on

• Tires: Vee Rail 24x2.25”, wire bead, LSG compound

Cockpit & Components:

• Handlebar: Marin Riser Bar, 700mm wide, 38mm rise

• Stem: Marin 3D Forged Alloy, 35mm extension

• Headset: FSA No.57E Semi-Sealed

• Grips: Marin Closed-End

• Seatpost: Marin Alloy, 30.9mm

• Saddle: Marin DJ

• Pedals: Alloy Platform

• Extras: Marin Chain Tension Device

🎯 Who’s It For?

✅ Groms who are ready to drop into bigger lines
✅ Parents who want a real DJ build for serious progression
✅ Young rippers graduating from their first BMX
✅ Fans of Matt Jones and the Alcatraz vibe

🟡 Final Word

The Marin Alcatraz JR is the real deal for small riders with big dreams. It’s built to the same standard as the adult model, not watered down. It’s tough, rad, and designed to grow with confidence and skill. The only thing “junior” about this ride is the wheel size.

Ready to launch? So is the Alcatraz JR.