Mountain Frames

The foundation for the Alcatraz build of your dreams. The Series 3 aluminum frame is built for the hard knocks and is stiff enough for lightning-fast acceleration and tough enough for the heavy hits. Short stays keep manuals easy and ambidextrous cable routing means you can run your brake on the left or right of the bars. The Main Alcatraz frame kit comes supplied with an FSA headset, Marin chain tension device and Marin seat clamp. Available in two frame sizes, regular and long.

Developed in conjunction with freeride legend Matt Jones and taking its name from the most rough and tumble piece of Marin County, the San Quentin collection lives up to the notoriety of the namesake maximum security California State Prison. Blending the strength and style of our Alcatraz dirt jump frame with the natural trail savvy of the best hardtails, the San Quentin family of aggressive trail hardtails is the perfect mash-up for the modern trail rider. The Marin San Quentin shreds the boundaries of the mountain bike genres - doing it all with a huge splash of big air, speed, and style. Designed with the input of freeride legend Matt Jones, the San Quentin takes the DNA of our dirt-jumping Alcatraz and mutates it into a go-further and faster all-round, hardcore hardtail. Pedal all day in the hills, send it at the dirt jumps, carve the skatepark, go big in the bike park - it's all good on the San Quentin. The Marin San Quentin Frameset is supplied with a headset, seat clamp, and Marin rubber grommet kit For internal cable routing.

The all-new Alpine Trail series is our boldest and most capable line of enduro bikes ever, built upon our most advanced, most adjustable frames to date. Series 4 aluminum MultiTrac 2 LT frames feature mixed 29"/27.5" wheels, 170mm front and 160mm rear travel, and the utmost in adjustability. Riders can alter the head tube angle and bottom bracket/chainstay length, as well as run 29" rear wheels if desired. "Bear Box" downtube storage includes a zippered nylon bag to house trail essentials, and a 34.9mm seatpost increases strength and is compatible with the latest dropper posts. The Alpine Trail XR frame kit gives the rider the chassis to create the Alpine Trail that best meets their needs. All the essentials are included, from the rear shock to the headset, the rear axle and seattube collar. You bring your creativity and components to create the raddest bike on the trail.

Big mountains, epic passes, and all-day ripping descents. If you live for the alpine adventure and gravity-fueled downhills, look no further than the Alpine Trail series. Updated for 2021, the Alpine Trail is built around the longest travel version of our critically acclaimed MultiTrac platform with progressive slack headtube/steep seattube geometry, low-slung aluminum frames, and 29" wheels. The Alpine Trail is here to conquer all singletrack in its path. Unidirectional Carbon Fiber Frame - Alpine Trail Carbon 1 and 2 models feature high modulus carbon fiber and monocoque construction to deliver the strongest and stiffest Alpine Trail to date. Modern Geometry - The Alpine Trail is at the cutting edge of aggressive enduro geometry, bringing you the best long travel bike for the job. A 63.5° headtube angle, 78° seat tube angle, short 430mm chainstays, and a long front center unlock the trail for pure long travel bliss. Functional Long Travel - The Alpine Trail was built to give riders long travel with no sacrifice in pedaling efficiency, providing a bike that will outshine the competition on the climb and still allow you to hold it wide open on the descents.

Designed for bike park laps and the DH course, the all-new Quake has benefited from an immersive development cycle where top riders have provided invaluable feedback over multiple generations of development samples. During this time, it was proven both strong and capable by some of the best riders in the sport, including Matt Jones, Mark Matthews, and Vinnie Moonen at some of the most demanding events, including Darkfest and Hardline, along with some of the steepest and most challenging tracks on earth An all-new Series 4 MultiTrac 2 frame features 180mm rear wheel travel and flip chips that allow the rider to select the bottom bracket height and chainstay length, along with the ability to run a 29" rear wheel. The Quake frame kit includes a shock, headset and thru-axle, so it is all ready for you to build up the Quake that best suits your needs and budget.

The Rift Zone is our most speed oriented MultiTrac bike, created for the rider looking for the speed and roll over capabilities of 29" wheels in a trail capable package. Long, low, and slack trail geometry is more aggressive than an XC race bike for more control at top speed, and more fun while chasing seconds.