Marin Bikes

Alpine Trail Carbon 1

2021 Marin Alpine Trail Carbon 1 profile.

See this bike in a different color:
  • Suspension: RockShox Yari RC / Rock Shox Deluxe Select + RT
  • Wheel Size: 29"
  • Frame: Carbon Fiber
  • Size Range: S, M, L, XL

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.

Key upgrade from Alpine Trail XR:

  • All-new unidirectional carbon fiber front triangle

Jump to…

Specifications

  • FRAME

    All New 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

    RockShox Yari RC, 29”, 160mm of Travel, Air Sprung, Debonair, Rebound and Compression Adjust, Fast Black Stanchions, 110x15mm Maxle Stealth, 42mm Offset

  • REAR SHOCK

    Rock Shox Deluxe Select + RT, Debonair Air Spring, 2 Position Compression Adjustment, Rebound Adjustment, 205x65mm, Trunnion Upper Mount, M8x25mm Lower Mount

  • RIMS

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

  • HUB REAR

    Shimano HB-MT410B, 148x12mm, Centerlock, Microspline Freehub Body

  • HUB FRONT

    Shimano HF-MT410B, 110x15mm, Centerlock

  • SPOKE

    14g Black Stainless Steel

  • TIRES

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

  • DERAILLEUR REAR

    Shimano Deore, 12-Speed, SGS

  • DERAILLEUR FRONT

    -

  • SHIFT LEVER

    Shimano Deore, 12-Speed, SL6100-IR

  • CRANKSET

    FSA Comet Heavy Duty, Modular 1x, 32T Direct Mount Chainring, MegaTooth Technology, Boost Spacing

  • BOTTOM BRACKET

    Mega EXO 73mm BSA

  • CHAIN

    KMC X-12 Silver and Black

  • CASSETTE

    Shimano, Deore M6100 12-Speed, 10-51T

  • BRAKE FRONT

    Shimano BR-MT420, 4-Piston Hydraulic Disc, 203mm Rotor

  • BRAKE REAR

    Shimano BR-MT420, 4-Piston Hydraulic Disc, 180mm Rotor

  • BRAKE LEVERS

    Shimano BL-M4100 Hydraulic, I-Spec EV Compatible

  • HANDLEBAR

    Marin Mini-Riser, 6061 Double Butted Aluminum, 780mm Width, 28mm Rise, 5º Up, 9º Back

  • STEM

    Marin 3D Forged Alloy, 35mm

  • GRIPS

    Marin Single Clamp Locking

  • HEADSET

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

  • SEATPOST

    TranzX, YSP23JL, 1x Remote, Size S 125mm Travel, Size M and L 150mm Travel, Size XL 175mm Travel, 30.9mm

  • SADDLE

    Marin Speed Concept

  • PEDALS

    Not Included

  • EXTRAS

    Bolt-On Thru-Axle, Downtube Protector

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

Geometry

Alpine Trail Carbon 1 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 35 35 35 35
Crank Length 170 170 170 170

All lengths in millimeters

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.

Rock Shox Deluxe Select + RT

Rider weight and shock setup
LBS KG PSI
120 54 80
130 59 100
140 64 115
150 68 130
160 73 140
170 77 150
180 82 160
190 86 170
200 91 180
210 95 190
220 100 200
230 104 210
240 109 220
250 113 230
260 118 240
270 122 250

Reviews

Great frame geometry and suspension action, backed up by sleek carbon fibre looks and a solid suite of parts for the price.