Marin Alcatraz Frame 2021Jump and pump around your favorite dirt jumpsThe Marin Alcatraz Dirt Jump frame was designed hand in hand with slopestyle superstar Matt Jones. The frame features modern dirt jump geometry including a short chain-stay length and steep headtube-angle which makes the bike super easy to trick and maneuver. The 6061 Aluminum frame is overbuilt to handle the abusive demands of slopestyle riding. The horizontal dropouts with tensioners make a single-speed setup simple and easy. Marin designed the Alcatraz with the intent of creating the best dirt jump hardtail you've ever ridden. ReviewVitalMTB - " This hardtail frame features sliding dropouts for your single-speed builds but it also has a tab should you wish to run a derailleur. This bad boy retails for $1, 100 and you could be sending it like Matt. "PinkBike - "Marin's return to form is welcomed and the iconic brand has released and produced plenty of great bikes recently. Their new Alcatraz has been designed and developed with input from Matt Jones, the UK dirt jump and slopestyle star. "Bike Magazine - " The Alcatraz is a 6061 alloy single-speed or multi-speed compatible 26-inch hardtail worthy of the custom treatment. But to bring it to the masses, Marin decked it out for 2019 with a sweet but smart build kit. "FeaturesStiff aluminum frame overbuilt to handle the abuse of dirt jump ridingChain tensioners keep the single speed chain tightShort chain-stays give the bike a quick and snappy feelSteep head angle makes the bike easy to trick and spinSPECIFICATIONSFrameSeries 3 6061 Aluminum Frame, 26" Wheels, 135x10mm Horizontal Dropouts, Single Speed or GearedWheel Size26"Fork100mm recommendedHeadsetFSA Orbit, Sealed Cartridge Bearings, 1 1/8" x 1 1/2"Headtube DiameterTaperedBottom Bracket68/73mm threadedSeatpost30. 9mmSeat ClampMarin Single BoltDropout StyleHorizontal with chain tensionersCable routingExternalIntended UseDirt Jump, PumptrackNote: Components are subject to change without notice. Geometry and Size Guide// METRICINCHSizeOne SizeA: Seat Tube Length320B: Effective Top Tube600C: Stack575. 5D: Reach402E: BB Height317F: BB Drop22G: Head Tube Length115H: Head Tube Angle69 degI: Seat Tube Angle71 degJ: Standover Height650K: Chainstay Length395L: Wheelbase1053. 68Crank Arm Length170 mmStem Length35 mmHandlebar Width780 mmSuggested Rider HeightFrame SizeOne SizeSizeOne SizeA: Seat Tube Length12. 6B: Effective Top Tube23. 6C: Stack22. 7D: Reach15. 8E: BB Height12. 5F: BB Drop0. 9G: Head Tube Length4. 5H: Head Tube Angle69. 0 degI: Seat Tube Angle71. 0 degJ: Standover Height25. 6K: Chainstay Length15. 6L: Wheelbase41. 5Crank Arm Length170 mmStem Length35 mmHandlebar Width780 mmSuggested Rider HeightFrame SizeOne Size | Marin Bikes | Alcatraz Frame 2021 Gloss Magenta/Cyan/Hi-Vis Yellow/Black | Aluminum