Marin Bikes

Alpine Trail Carbon 2 Frame Kit

Find a Dealer
2021 Marin Alpine Trail Carbon 2 frame kit profile.

See this bike in a different color:
  • Price: $2,349.00*
  • Suspension: Fox Float DPX2
  • 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.

Jump to…

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 Routing, Chainstay Mounted Post Mount Disc Brake, 148x12mm Boost Thru- Axle, 73mm Threaded BB w/ ISCG05 Tabs

  • Rear Suspension

    Fox Float DPX2, Performance, EVOL Air Spring, 3 Position Compression Adjustment, Rebound Adjustment, 205x65mm, Trunnion Upper Mount, M8x25mm Lower Mount

  • Headset

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

  • Extras

    Marin MTB Seat Clamp, Bolt Type

  • Extras

    Bolt-On Thru-Axle

  • Extras

    Downtube Protector

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

Geometry

Alpine Trail Carbon 2 Frame Kit 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

All lengths in millimeters

Technology

Detail image of Alpine Trail Carbon tube

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.

Detail of Alpine Trail chainstay.

SERIES 4 ALUMINUM FRAME

Alpine Trail models feature Series 4 aluminum frames, with detailed forgings, highly manipulated tubes, and full internal cable routing, giving the rider the highest-end alloy frame that Marin offers.

Learn More
Alpine Trail rocker link detail.

ONE PIECE FORGED ROCKER

The heart of the Alpine Trail’s MultiTrac suspension is the forged one-piece rocker link. The strength and stiffness of the rocker keeps the rear of the bike tracking straight, providing smooth suspension operation under the most demanding conditions.

Detail of the tire clearance that the one piece forged rocker link allows for.

BRIDGELESS SEATSTAY

The stiffness of the one-piece rocker link allows for a bridgeless seatstay design, offering zero compromises on stiffness while at the same time allowing for maximum tire clearance and short chainstays.

Detail shot of the Alpine Trail's slack 63.5° head tube angle.

MODERN ANGLES

The Alpine Trail has a slack 63.5º head tube angle paired with a steep 78º seat tube angle and long reach to provide the best modern trail bike experience. The bike lets you climb better than ever before, while giving you even more confidence when descending.

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 DPX2

Rider weight and air pressure
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

You May Also Like

Martha Gill stands with her bike

Enduro World Series Tested

Martha Gill has chosen the Alpine Trail Carbon frame as her chassis of choice for racing the Enduro World Series