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Marin's Alcatraz was designed from the ground up to be the best dirt jump hardtail you have ever ridden. Marin have worked hand-in-hand with Matt Jones to define the exact needs of a modern dirt jump frame, and are proud to release a limited number of frames into the world. The 6061 aluminum frame is stiff and overbuilt for abuse, with a tapered headtube and 135x10mm horizontal dropouts with a chain tension device for either single speed or geared builds.
- Weight: 1.95KG
- Frameset comes with FSA headset and Marin seatclamp
Series 3 6061 Aluminum Frame, 26” Wheels, 135x10mm Horizontal Dropouts, Single Speed or Geared
FSA Orbit, Sealed Cartridge Bearings, 1 1/8" x 1 1/2”
Marin Single Bolt
Marin Chain Tension Device with Rear Derailleur Hanger
Next day dispatch
Shipping of Parts, Accessories and Apparel
Shipping of Bikes
We’re so confident that you’ll love our extensive range of bikes, that we’ll let you ride one as your own for a full 14 days and if you don’t like it, simply e-mail us at firstname.lastname@example.org and we’ll pick it up from you, free of charge! Just make sure you keep the box so it can be re-used to send it back. Click here for more information.
All of our bicycles come with a Free Pro Build valued at $99. This means that your bicycle will be pre built by our professional mechanics. For your convenience, safety and comfort all our bikes are fully assembled prior to delivery. The bike is then packaged back into a box for secure shipment.
When your bike arrives, all you have to attach is the front wheel, the handlebar and pedals, everything else has been done – the headset has been adjusted, wheels trued, pedals and seat post greased, brakes and gears calibrated, and the tyres have been pumped up (please note upon arrival, in some cases you may need to add more air to tyres).
Most companies simply sell you the bike as it comes from the factory, which will require significant know-how to get your bike on the road. Currently we are the only Australian company providing this service, and have the 14 day test ride to back it up.
All tools are supplied. If you are unsure of anything during assembly please contact us.
Whilst your new bicycle will have already gone through our Pro Build process, you will still need to complete some minor final assembly steps when you take your bicycle out of its box.
Please follow the video playlist below to correctly complete the setup of your new bike:
- 10-15min - You have assembled bikes before
- 15-25min - You are mechanically handy
- 30-40min - Never assembled a bike and working with tools isn't your thing
Unboxing your bike:
Start by carefully opening the top flap to expose the contents. You will see the bike with plenty of protective packaging and next to the rear wheel, the saddle & seatpost, a small cardboard box where your pedals, tools, bell and reflectors are. If you ordered any other products with the bike, it is likely they were placed on the bottom of the box as well. Remove all the loose items before pulling the bike out of the box and gently placing it on the floor.
Keep the box and all the protective packaging found on the bike in case you choose to change frame sizes, upgrade/downgrade the bike, or return the bike for a full refund under the 14 Day Test Ride Policy.
How to install a thru axle:
Disc Brake Setup:
How to Install Handlebars and faceplate:
How to install pedals on your bike:
Congratulations on your Purchase:
This bicycle is backed by a LIFETIME factory warranty on frame and full manufacturer’s warranty on parts. Lifetime warranty refers to the lifetime of the original owner.
Warranty is valid only for bicycle that has been properly and well-maintained under the following conditions:
- All damaged or fractured or broken frame / fork / component which was caused by manufacturing or assembling error in factory.
- Non functioning mechanism caused by manufacturing error in factory.
Warranty is NOT valid for:
- Incorrect assembly, i.e pedals installed in the wrong crank arm.
- Normal degradation caused by frequent use, such as degrading brake shoe, deflated tire, etc
- Surface defects, such as stained, marred, defaced, etc
- Damaged caused by misuse or accident
- Other damages which are not caused by factory error
- Bicycle which has been sold to other party
- Bicycle used in commercial, such as rented
- Bicycle which has not been well-maintained
For any damages which is guaranteed by the brand as the first condition above, the brand will repair or replace damaged frame / fork / component with the one of the same brand or similar.
Warranty is valid for all Polygon and Marin bicycles to the original owner only, by showing the purchase invoice.
To make a claim click here.