Marin Alpine Trail XR 2025 Frameset

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 aluminium 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.

Technologies

• Multitrac 2 Lt: MultiTrac 2 LT debuts on the aluminum-framed Alpine Trail alloy models. MultiTrac 2 LT shifts from seatstay pivots to chainstay pivots, ensuring that the suspension performance matches our design goals, which are not achievable using pivots located on the seatstay once travel exceeds 150mm. With MultiTrac 2 LT, the benefits of relocating the rear pivot points from the seatstay to the chainstay become apparent, as it reduces anti-rise, allowing for better chassis control while braking, more mid-stroke support, and better feel at bottom out.
• Adjustable Geometry: With the integrated flip chips, adjustable headset and an aftermarket 29"" rear wheel, Alpine Trail aluminium riders can select 12 unique configurations to run their bikes. These configurations allow the best fine-tuning of chassis to trail conditions available. Flip chips are easy to reconfigure trailside and easily done using a 6mm hex wrench, require no additional parts, and incorporate laser-etched graphics that indicate the position of the chips. The stock 27.5"" rear wheel can be swapped out for a 29"" rear wheel (not included) if desired, along with changing the position of the seatstay flip chips. Furthermore, the flip chips located at the seatstay pivots alter the bottom bracket height and chainstay length (low BB/long CS setting = 345/442mm, high BB/short CS setting = 352/435mm) so that riders can perfectly dial their bike in to match the terrain they are looking to conquer.
• Bear Box Downtube Storage: The all-new Alpine Trail aluminium models now feature our Bear Box integrated downtube storage, complete with a custom nylon bag with a weather-sealed zipper. The hatch door is secure and double-sealed, with bottle bosses. Keep your riding essentials safe and protected from the elements during your big ride.
• Adjustable Headtube Angle: Using our proprietary headset cups and inserts, the headtube angle on Alpine Trail aluminium models can be adjusted to +0.75° or -0.75° from the standard 63° position, giving the rider three options.
• Protection: Chainstay and seatstays are protected with durable rubber guards that minimize noise and protect paint finishes, and integrated downtube guards helps deflect errant rocks, logs, or anything else riders may encounter on the trail.
• One Piece Rocker Link: The Alpine Trail Carbon utilizes a stout one piece rocker link for maximum frame rigidity and suspension performance, while also allowing for bridgeless seatstays for enhanced clearance.
• Downtube Protection: Alpine Trail Carbon models have an integrated and replaceable downtube protector to fend off inevitable log/rock/whatever strikes that may occur when out on a rowdy ride.
• Chainstay Protection: The chainstays on Alpine Trail Carbon models feature an aggressive chainstay protector that not only protect your frame from chain slap, but also quiet the ride.

Specification

Frame and Forks

• Frame: All New Series 4 6061 Aluminium , 29"" Wheels, 160mm Travel MultiTrac LT Suspension Platform, Integrated Downtube Storage, Adjustable Headset & CS Length/BB Height, Full Internal Cable Routing, Chainstay Mounted Post Mount Disc Brake, 148 x 12mm Boost Thru- Axle, 73mm Threaded BB with ISCG05 Tabs
• Rear Suspension: RockShox Super Deluxe Coil Ultimate, 205 x 65mm, 30 x M8 Lower Hardware, Custom Tune, Spring Rates Small / Medium: 350lbs, Large / X-Large: 450lbs
• Headset: FSA Custom, Adjustable HTA Design