Marin Alpine Trail XR 2025 Bikes

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.

"XR" = "Xtra Rad" here at Marin, and like the XR models that have preceded the new Alpine Trail, we created a model for the more discriminating rider. We focused our efforts on building a bike with high performance RockShox Ultimate-level suspension, a SRAM GX Eagle Lunar 12-speed drivetrain and DB8 4-piston brakes - all equipment that helps the rider level up, but without blowing the budget. Don't forget the Maxxis rubber and our proprietary CNC machined 35mm stem and matching Trail Bar.

Technology

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 aluminum 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 aluminum 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 aluminum models can be adjusted to +0.75° or -0.75° from the standard 63° position, giving the rider three options.

Specifications

Frame and Forks

• Frame: All New Series 4 6061 Aluminum
• Forks: RockShox Zeb Ultimate, 170mm Travel, 29", 110 x 15mm Maxle Stealth, 44mm Offset
• Rear Shock: RockShox Super Deluxe Coil Ultimate, 205 x 65mm, 30 x M8 Lower Hardware, Custom Tune, Spring Rates Small / Medium: 350lbs, Large / X-Large: 450lbs

Drivetrain

• Crankset: SRAM GX Eagle, 32 Tooth, 55MM CL, 170MM Length
• Rear Derailleur: SRAM GX Eagle Lunar 12-Speed
• Cassette: SRAM GX 1275 T-Type 10-52 Tooth
• Chain: SRAM NX Eagle

Braking/Shifting

• Front Brake: SRAM DB8 4-Piston Hydraulic Disc, HSC 200mm Rotor
• Rear Brake: SRAM DB8 4-Piston Hydraulic Disc, HSC 200mm Rotor
• Brake Levers: SRAM DB8 Hydraulic

Wheels

• Front Hub: Formula, DC-711, 110 x 15mm, 6-Bolt Disc, 32 Hole
• Rear Hub: Formula, DCL-3482, 148 x 12mm, 4 Sealed Bearings, 6-Bolt Disc, XD Driver, 32 Hole
• Rims: Marin, Double Wall Alloy, 29mm Inner, Sleeved Joint, Disc Specific, 32 Hole, Tubeless Compatible
• Tyres: Maxxis Assegai MaxxGrip, Front 29 x 2.5" EXO+, Rear 27.5 x 2.5" DoubleDown, Tubeless compatible

Finishing Kit

• Handlebars: Marin Mini Riser, 6061 Double Butted Aluminum, 780mm Width, 28mm Rise, 5º Up, 9º Back
• Grips: Marin Grizzly Lock-On
• Stem: Marin CNC, 35mm Length, 35mm Bar Bore
• Seatpost: TranzX, YSP39 1x Remote, 34.9mm Seatpost Diameter, Travel Small = 150mm, Medium / Large = 170mm, X-Large = 200mm
• Saddle: Marin Speed Concept