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Marin

Marin Alcatraz 24inch Junior Dirt Jump Bike

£849.00
Size Guide
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined

Hassle free returns

Returns: We hope everything arrives to you as expected.  If a order(s) is broken or spoiled when it is delivered then you should notify us as soon as possible or in any case within 7 days of delivery, otherwise the returns policy becomes invalid. 

You will have the option of returning the whole order or just the affected items. Please notify us by email on northwestmtb@aol.com or by calling the shop on 0161 428 3311 & include pictures of the damaged box/packet & product and we will deal with it quickly.

Please return using a signed for delivery service like Royal Mail or a Courier that requires a signature on receipt by one of our staff.

For purchased in store products, returns, refunds or exchanges are only available in store using the same payment method as purchase.

All refunds under this returns policy will be paid within 2/5 days of us receiving the merchandise at the shop in it's original packaging to prevent any further damage.

Marin Alcatraz 24inch Junior Dirt Jump Bike

Season:2026

Brand:Marin

Code:739060001

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.

Technical Information

  • FRAME

    Series 3 6061 Aluminum, 24” Wheels, 135x10mm Horizontal Single Speed Dropouts, 73mm Threaded BB, ISCG 05 Tabs

  • FRONT SUSPENSION

    Marin Series 2 CroMo 24", Suspension Corrected, 100x9mm Dropouts

  • REAR SUSPENSION

    -

  • RIMS

    Marin Custom Extrusion, 27mm Inner, Pinned Joint

  • HUB, REAR

    Forged Alloy, 135x10mm, Bolt-On, Quad Sealed Bearings, Disc, 32H

  • HUB, FRONT

    Forged Alloy, Bolt On 3/8" Axle, 100mm Spacing

  • SPOKES

    14g Black Stainless Steel

  • TIRES

    Vee Tire, Rail 24x2.25”, LSG Compound, Wire Bead

  • DERAILLEUR, REAR

    -

  • DERAILLEUR, FRONT

    -

  • SHIFT LEVER

    -

  • CRANKSET

    Marin Forged Alloy, Alloy 32T DM Chainring, 155mm Length

  • BOTTOM BRACKET

    External Sealed Cartridge Bearings

  • CHAIN

    KMC HL-1

  • CASSETTE

    14T Single Speed Cog

  • BRAKE, FRONT

    Tektro MD-M280 Mechanical Disc 160mm Rotor

  • BRAKE, REAR

    Tektro MD-M280 Mechanical Disc 160mm Rotor

  • BRAKE LEVERS

    Tektro CL-330TS Alloy

  • 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

  • GRIPS

    Marin MTN, Closed End

  • HEADSET

    FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8" x 1 1/2”

  • SEATPOST

    Marin Alloy, 30.9mm

  • SADDLE

    Marin DJ Saddle

  • PEDALS

    Alloy Platform

  • EXTRAS

    Marin Chain Tension Device

Sizing Information
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