Marin Bikes

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Alpine Trail XR

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2021 Marin Alpine Trail XR profile.

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  • Price: $3,999.00*
  • Suspension: RockShox Lyrik Ultimate / Rock Shox Super Deluxe Coil Ultimate RCT
  • Wheel Size: 29"
  • Frame: Aluminum
  • 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.

Key upgrades from Alpine Trail 7:

  • RockShox Lyrik Ultimate/Super Deluxe coil suspension
  • Shimano SLX/XT drivetrain
  • FSA Gradient crankset
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Enduro/All Mountain

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Specifications

  • Frame

    Series 4 6061 Aluminum Frame, 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

  • Front Suspension

    RockShox Lyrik Ultimate, 29”, 160mm of Travel, Air Sprung, Debonair, Charger 2.1, Fast Black Stanchions, 110x15mm Maxle Stealth, 42mm Offset

  • Rear Suspension

    Rock Shox Super Deluxe Coil Ultimate RCT, Coil Spring, Climb Switch, LS Compression and Rebound Adjustment, 205x65mm, Trunnion Upper Mount, 25mmxM8 Lower Mount (S/M = 350lb, L/XL = 450lb)

  • Rims

    Marin Aluminum Double Wall, 29mm Inner, Sleeved Joint, Disc Specific, Tubeless Compatible

  • Hub, Rear

    Shimano HB-MT510B, 148x12mm, Centerlock, Microspline Freehub Body

  • Hub, Front

    Shimano HF-MT410B, 110x15mm, Center\lock

  • Spoke, Nipples

    14g Black Stainless Steel

  • Tires

    Maxxis Assegai 29x2.5”, MAXX TERRA, EXO+, 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, Mego EXO Spindle, Boost Spacing

  • Bottom Bracket

    MEGAEVO BB, 73mm BSA Threaded

  • Chain

    KMC X-12 Silver and Black

  • Cassette

    Shimano SLX M7100 Cassette, 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 35mm 7000 Alloy Bar, 780mm Length, 5 Degree Up, 8 Degree Back

  • Stem

    Marin CNC Stem, 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 Composite Remote, Size S 125mm Travel, Size M and L 150mm Travel, Size XL 175mm Travel, 30.9mm

  • Saddle

    Marin Speed Concept

  • Pedals

    -

  • Extras

    Bolt-On Thru-Axle

  • Extras

    Downtube Protector

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

Geometry

Alpine Trail XR 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 714 716 732 734
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

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.

Profile image of the Marin Alpine Trail XR mountain bike

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
Detail of the one piece rocker link on the Alpine Trail mountain bike

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 SETUP

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 SETUP

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.

RockShox Lyrik setup page >>

Rock Shox Super Deluxe Coil Ultimate RCT

Rider weight and air pressure
LBS KG COIL LB/IN
120 54 300
130 59 300
140 64 300
150 68 350
160 73 350
170 77 350
180 82 400
190 86 400
200 91 400
210 95 450
220 100 450
230 104 450
240 109 500
250 113 500
260 118 500
270 122 500

Reviews

Budget friendly all-rounder with some muscle!

The Marin will take on any trail you dare throw it down... Rated four out of five stars.

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