Marin Bikes

Alpine Trail Carbon 2

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2021 Marin Alpine Trail Carbon 2 profile.

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  • Price: $6399*
  • Suspension: Fox 38 Performance Elite / Fox Float X
  • Wheel Size: 29"
  • Frame: Carbon Fiber
  • Size Range: S, M, L, XL
  • Manufacturer’s suggested retail price may not include additional shipping or preparation charges. Please contact your local Marin dealer for a quote.

BIG ALL-MOUNTAIN DAYS WHERE TRAVEL AND GEOMETRY MATTER MOST

BUILT FOR ABUSE AND ROWDY RIDING

ENDURO-STYLE RIDING AND RACING

BIG BIKE, BIG WHEELS, BIG FUN

The Alpine Trail is a 29” wheeled full suspension bike built for the all day enduro rider that earns their downhill fun.

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Specifications

  • FRAME

    Unidirectional Carbon Fiber Front Triangle, Series 4 Alloy Rear End, 29” Wheels, 150mm Travel MultiTrac Suspension Platform, Internal Dropper Post and Rear Derailleur Housing, Chainstay Mounted Post Mount Disc Brake, 148x12mm Boost Thru- Axle, 73mm Threaded BB w/ ISCG05 Tabs

  • FORK

    Fox 38 Performance Elite, 160mm Travel, 29" , 110x15mm Boost Kabolt Thru-Axle, 44mm Offset, Integrated Fox Fender

  • REAR SHOCK

    Fox Float X Performance, 2 Position Compression Adjustment, Rebound Adjustment, 205x65mm, Trunnion Upper Mount, 25mmxM8 Lower Mount

  • RIMS

    Marin, Double Wall Alloy, 29mm Inner, Welded Joint, Disc Specific, 32H, Tubeless Compatible

  • HUB REAR

    Shimano FH-TC500MSB, 148x12mm, Disc, MicroSpline Freehub Body

  • HUB FRONT

    Shimano FH-TC500, 110x15mm

  • SPOKE

    14g Black Stainless Steel

  • TIRES

    Front: Maxxis Assegai 29x2.5”, MaxxTerra, EXO+, Tubeless Compatible; Rear: Maxxis Assegai 29x2.5”, MAXX GRIP, DoubleDown, Tubeless Compatible

  • DERAILLEUR REAR

    Shimano XT 12-Speed, SGS

  • DERAILLEUR FRONT

    -

  • SHIFT LEVER

    Shimano SLX 12-Speed, I-Spec EV

  • CRANKSET

    FSA Gradient, Modular 1x, 32T Direct Mount Chainring, MegaTooth Technology, MegaExo Spindle, Boost Spacing

  • BOTTOM BRACKET

    FSA MegaEvo BB, 73mm BSA Threaded

  • CHAIN

    KMC X-12 Silver and Black

  • CASSETTE

    SunRace, 12-Speed, Microspline, 10-51T

  • BRAKE FRONT

    Shimano SLX, 4-Piston Hydraulic Disc, 203mm Rotor

  • BRAKE REAR

    Shimano SLX, 4-Piston Hydraulic Disc, 180mm Rotor

  • BRAKE LEVERS

    Shimano SLX Hydraulic, I-Spec EV

  • HANDLEBAR

    Marin Trail, 35mm Clamp, 7000 Alloy Bar, 800mm Length, 20mm Rise, 5 Degree Up, 8 Degree Back

  • STEM

    Marin CNC, 35mm Length, 35mm Bar Bore

  • GRIPS

    Marin Single Clamp Locking

  • HEADSET

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

  • SEATPOST

    X-Fusion Manic, 1x Shimano I-Spec EV Remote, Size S 125mm Travel, Size M and L 150mm Travel, Size XL 170mm Travel, 30.9mm

  • SADDLE

    Marin Trail Speed Concept Pro

  • PEDALS

    -

  • EXTRAS

    Bolt-On Thru-Axle

Specifications, pricing, and availability are subject to change without notice.

Geometry

Alpine Trail Carbon 2 geometry diagram
S M L XL
Stack 619 628 632 643
Reach 430 455 480 515
Headtube Angle 63.5° 63.5° 63.5° 63.5°
Headtube Length 100 110 115 130
Seattube Angle 78° 78° 78° 78°
Seattube Length 390 400 425 430
Toptube Effective 561.7 589 615 652
BB Height 342 342 342 342
BB Drop 35 35 35 35
Chainstay 430 430 430 430
Wheelbase 1199 1229 1256 1297
Standover Height 690 694 695 698
Fork Offset 44 44 44 44
Seatpost Diameter 30.9 30.9 30.9 30.9
Handlebar Width 780 780 780 780
Stem Length 50 50 50 50
Crank Length 170 170 170 170

All lengths in millimeters

Technology

Marin Alpine Trail XR AXS rear triangle detail.

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.

Marin Alpine Trail chainstay flip chip detail.

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.

Marin Alpine Trail Bear Box downtube storage.

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.

Marin Alpine Trail XR AXS headtube detail.

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.

Marin Alpine Trail protection details.

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.

Additionally, all aluminum frame models include a gasket around the cable exit hole reduces noise and prevents the brake hose and derailleur cable from marring the frame, and a mudflap positioned over the lower suspension pivot keeps spray and muck off the bearings. Cable ports are of an all-new design and keep the frame innards sealed. These ports use rubber membranes punctured during initial assembly and seal around the housing or hose once inserted. They will be available as a service part for when riders make changes to their components.

Marin Alpine Trail one piece rocker link detail.

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.

Marin Alpine Trail downtube protector detail.

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.

Marin Alpine Trail chainstay protector detail.

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.

Suspension Setup

REAR SHOCK SET UP

Recommended Sag = 30%/19.5mm

Step 1: Set correct pressure in rear shock.

Step 2: Sit on the bike and cycle the suspension (*with correct riding gear).

Step 3: Reset O-ring and sit on the bike, DO NOT BOUNCE, carefully step off.

Step 4: Measure sag (from o-ring to seal of shock), If it does not match the bike’s recommended sag in millimeters repeat process.

Step 5: Adjust rebound setting to ensure proper control.

FORK SET UP

Marin recommends that all bikes front and rear suspension feel balanced

Step 1: After rear sag is set follow the recommended pressure from the fork manufacture.

Step 2: Bounce evenly up and down on the bike, cycling the suspension up and down to make sure both front and rear suspension feel balanced, if the front does not match the rear add or release pressure.

Step 3: Once the bike feels balanced adjust the rebound damping to ensure proper control.

Fox Float X

Rider weight and shock setup
LBS KG PSI
120 54 106
130 59 116
140 64 128
150 68 140
160 73 152
170 77 164
180 82 176
190 86 188
200 91 202
210 95 216
220 100 230
230 104 245
240 109 260
250 113 275
260 118 291
270 122 308

Reviews

There’s something refreshingly classic about how Marin approached the Alpine Trail Carbon. The choices in travel, spec and geometry might, from a distance, seem a little all over the place, but what results is a bike that can go all over the place. A bike that feels as natural on mellow local lunch loops as it does on big endless descents. The sum of its parts is a versatile machine that has something for most of us ‘normal’ riders, but with just enough extra for the superhuman shredders.

Marin’s Alpine Trail Carbon comes with everything you want, right out of the box. It’s rough and ready to rumble, with high-level components at a price that can’t be beat.

The Marin Alpine Trail is an exceptionally good value for the money, and one of the most playful, fun Enduro bikes that we’ve been on recently. If you’re someone who’s more inclined to approach the trail like a playground and look for side hits and things to pop off, but also want a bike that’s up for some steeper, gnarlier trails, maybe some bike park laps, and a whole bunch of airtime, it’s great.

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