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Alpine Trail E2 Bosch

Marin Alpine Trail E2 Bosch studio profile.

See this bike in a different color:
  • Suspension: Fox 38 Performance Elite/Fox DHX2 Performance Elite
  • Wheel Size: Mixed 29"/27.5"
  • Frame: Aluminum
  • Size Range: M, L, XL

Highlights

System
Bosch Performance Line CX
Max torque
85Nm
Max assisted speed
Class 1, 20MPH (USA/NZ); 25 km/h rest of world
Battery capacity
750Wh
31-78 miles / 50-125km
Based on rider weight, terrain, climate and level of assistance used.
Rider app
Bosch eBike Flow

The all-new Alpine Trail E Bosch is our biggest, baddest beast of a bike family. Moving one step beyond in capability from the Alpine Trail E models, the new Alpine Trial E Bosch eMTBs are constructed with all-new Series 4 aluminum MultiTrac 2 LT frames that feature significant upgrades for riders who challenge themselves with the steepest, most technical terrain, as well as those who require the maximum in range.

We've increased the travel by 10mm at both ends, now standing at 170mm (f) and 160mm (r), and relocated the pivots to the chainstays to deliver the suspension performance and tunability demanded by the longer travel. Riders have the ability to alter the head tube angle by +/- .75° by repositioning the lower headset cup while the bottom bracket height/chainstay length can be changed by the means of seatstay flip chips.

Bosch's Performance Line CX drive units twist out 85Nm of torque and are backed by large capacity 750Wh PowerTube batteries, nestled safely in the frame's downtube, giving you the largest battery in the Marin range for the biggest adventures.

The Alpine Trail E2 (Bosch) lights the wick with a premium Fox suspension pairing and Shimano's XT 12-speed drivetrain, along with our own proprietary CNC 35mm stem and Trail Bar combo.

Jump to…

Specifications

  • Frame

    All New, Series 4 Alloy, 160mm MultiTrac Suspension LT, Adjustable Headset & CS Length/Height, Integrated Battery/Charging Port, 148mm Rear Thru-Axle

  • Front Suspension

    Fox 38 Performance Elite, 170mm Travel, 29" , 110x15mm Boost Kabolt Thru-Axle, 44mm Offset, Integrated Fox Fender

  • Rear Suspension

    Fox Float DHX2, Performance Elite, Low Speed Compression and Rebound Adjustment, 205x65mm, Trunnion Upper Mount, 30mmxM8 Lower Mount, M Spring Rate = 450lb, L Spring Rate = 500lb, XL Spring Rate = 550lb

  • Rim

    Front: Marin Aluminum Double Wall, 29" Diameter, 32mm Inner Rim Width, Pinned Joint, Disc Specific, Tubeless Compatible; Rear: Marin Aluminum Double Wall, 27.5" Diameter, 32mm Inner Rim Width, Pinned Joint, Disc Specific, Tubeless Compatible

  • Hub Rear

    Shimano HB-TC500, 148x12mm, Centerlock, Standard Freehub Body

  • Hub Front

    Shimano FH-TC500, 110x15mm, Centerlock, 32H

  • Spokes

    14g Black Stainless Steel

  • Tires

    Vee Tire Co Attack HPL, E-Control Compound, Front 29x2.5", Rear 27.5x2.5"

  • Derailleur Rear

    Shimano XT 12-Speed, SGS

  • Derailleur Front

    -

  • Shift Lever

    Shimano SLX 12-Speed, I-Spec EV

  • Crankset

    e*thirteen e*spec Plus Cranks, 160mm Length

  • Motor

    Bosch Performance Line CX, 85Nm, 20MPH (US, NZ)/25 km/h (Rest of World) Top Assisted Speed

  • Chain

    KMC E12S, E-Bike Specific Chain

  • Cassette

    Shimano SLX M7100 Cassette, 12-Speed, 10-51T

  • Brakes Front

    TRP DH-R EVO 4-Piston Hydraulic Disc, 203mm, 2.3mm Thick

  • Brakes Rear

    TRP DH-R EVO 4-Piston Hydraulic Disc, 203mm, 2.3mm Thick

  • Brake Levers

    TRP DH-R EVO Hydraulic

  • 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 Grizzly Lock On

  • Headset

    FSA Custom Headset, Adjustable HTA Design

  • Seatpost

    TranzX, YSP39 1x Remote, 34.9 Seatpost Diameter, Travel S = 150mm, M/L = 170mm, XL = 200mm

  • Saddle

    Marin Speed Concept

  • Pedals

    -

  • Battery

    Bosch PowerTube 750 Wh

  • Display

    Bosch BRC3100 Systems Controller

  • Switch

    Bosch BRC3300 Bluetooth Remote 22.2mm Clamp

  • Extras

    e*thirteen e*Spec Chainguide

  • Extras

    Cush Core Pro Tire Inserts, Marin Tire Sealant 300ml Bottle, Bosch EB12.110.016; 2A Charger

  • Range, Charging Time

    31-78 miles/50-125km (Based on Rider Weight, Terrain, Climate and Level of Assist Used), 11 Hours (estimated, under ideal conditions)

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

Geometry

We’ve brought adjustable geometry features to the new Alpine Trail E Bosch models—integrated chainstay flip chips and an adjustable headset yield six possible configurations to suit a variety of trails best. Flip chips are easy to reconfigure trailside and are quickly changed using a 6mm hex wrench. They require no additional parts and incorporate laser-etched graphics that indicate the position of the chips. Furthermore, the flip chips located at the seatstay pivots alter the bottom bracket height and chainstay length (low BB/long CS setting = 347/443mm, 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. Finally, using our proprietary headset cups and inserts, the headtube angle can be adjusted to +0.75° or -0.75° from the standard 63° position, giving the rider three options to best suit their preferences.

Geometry configuration

  • Front/Rear Wheels: F: 29"/R: 27.5"
  • BB and Chainstay: High BB/Short CS
  • Headtube Angle: 0° Headset Cup
  • Front/Rear Wheels: F: 29"/R: 27.5"
  • BB and Chainstay: High BB/Short CS
  • Headtube Angle: -.75° Headset Cup
  • Front/Rear Wheels: F: 29"/R: 27.5"
  • BB and Chainstay: High BB/Short CS
  • Headtube Angle: +.75° Headset Cup
  • Front/Rear Wheels: F: 29"/R: 27.5"
  • BB and Chainstay: Low BB/Long CS
  • Headtube Angle: 0° Headset Cup
  • Front/Rear Wheels: F: 29"/R: 27.5"
  • BB and Chainstay: Low BB/Long CS
  • Headtube Angle: -.75° Headset Cup
  • Front/Rear Wheels: F: 29"/R: 27.5"
  • BB and Chainstay: Low BB/Long CS
  • Headtube Angle: +.75° Headset Cup
F/R Wheels BB and Chainstay Headtube Angle Select
F: 29"/R: 27.5" High BB/Short CS 0° Headset Cup
F: 29"/R: 27.5" High BB/Short CS -.75° Headset Cup
F: 29"/R: 27.5" High BB/Short CS +.75° Headset Cup
F: 29"/R: 27.5" Low BB/Long CS 0° Headset Cup
F: 29"/R: 27.5" Low BB/Long CS -.75° Headset Cup
F: 29"/R: 27.5" Low BB/Long CS +.75° Headset Cup
Alpine Trail E2 Bosch geometry diagram
M L XL
STACK 633.51 642.46 646.93
REACH 460 490 520
HEADTUBE ANGLE 63.5° 63.5° 63.5°
HEADTUBE LENGTH 115 125 130
TOPTUBE EFFECTIVE 591.33 626.52 659.24
SEATTUBE ANGLE 79° 78.8° 78.6°
SEATTUBE LENGTH 410 420 430
BB HEIGHT 352 352 352
BB DROP (REAR/FRONT) 7/24 7/24 7/24
CHAINSTAY 435 435 435
WHEELBASE 1248.12 1282.57 1314.8
STANDOVER HEIGHT 712.81 721.75 732.94
FORK OFFSET 44 44 44
SEATPOST DIAMETER 34.9 34.9 34.9
STEM LENGTH 35 35 35
CRANK LENGTH 160 160 160
M L XL
STACK 631.55 640.5 645.07
REACH 460.19 490.11 519.9
HEADTUBE ANGLE 62.9° 62.9° 62.9°
HEADTUBE LENGTH 115 125 130
TOPTUBE EFFECTIVE 589.37 624.55 657.29
SEATTUBE ANGLE 79.2° 78.9° 78.7°
SEATTUBE LENGTH 410 420 430
BB HEIGHT 351 351 351
BB DROP (REAR/FRONT) 8/25 8/25 8/25
CHAINSTAY 435 435 435
WHEELBASE 1255.65 1289.9 1321.51
STANDOVER HEIGHT 711.64 720.66 731.98
FORK OFFSET 44 44 44
SEATPOST DIAMETER 34.9 34.9 34.9
STEM LENGTH 35 35 35
CRANK LENGTH 160 160 160
M L XL
STACK 636.16 645.01 649.5
REACH 458.83 489.09 519.2
HEADTUBE ANGLE 64° 64° 64°
HEADTUBE LENGTH 115 125 130
TOPTUBE EFFECTIVE 593.47 628.66 661.39
SEATTUBE ANGLE 78.8° 78.6° 78.4°
SEATTUBE LENGTH 410 420 430
BB HEIGHT 353 353 353
BB DROP (REAR/FRONT) 5/22 5/22 5/22
CHAINSTAY 435 435 435
WHEELBASE 1241.32 1276.48 1308.94
STANDOVER HEIGHT 714.66 723.38 734.52
FORK OFFSET 44 44 44
SEATPOST DIAMETER 34.9 34.9 34.9
STEM LENGTH 35 35 35
CRANK LENGTH 160 160 160
M L XL
STACK 637.22 646.31 650.92
REACH 454.84 484.91 515
HEADTUBE ANGLE 63° 63° 63°
HEADTUBE LENGTH 115 125 130
TOPTUBE EFFECTIVE 594.92 627.59 660.36
SEATTUBE ANGLE 78.4° 78.3° 78.2°
SEATTUBE LENGTH 410 420 430
BB HEIGHT 345 345 345
BB DROP (REAR/FRONT) 14/31 14/31 14/31
CHAINSTAY 443 443 443
WHEELBASE 1255.66 1290.12 1322.36
STANDOVER HEIGHT 706.29 715.1 726.28
FORK OFFSET 44 44 44
SEATPOST DIAMETER 34.9 34.9 34.9
STEM LENGTH 35 35 35
CRANK LENGTH 160 160 160
M L XL
STACK 639.87 648.87 653.49
REACH 453.64 483.97 514.17
HEADTUBE ANGLE 62.4° 62.4° 62.4°
HEADTUBE LENGTH 115 125 130
TOPTUBE EFFECTIVE 594.51 629.76 662.53
SEATTUBE ANGLE 78.4° 78.1° 78°
SEATTUBE LENGTH 410 420 430
BB HEIGHT 347 347 347
BB DROP (REAR/FRONT) 12/29 12/29 12/29
CHAINSTAY 443 443 443
WHEELBASE 1248.91 1284.07 1316.53
STANDOVER HEIGHT 708.2 716.79 727.91
FORK OFFSET 44 44 44
SEATPOST DIAMETER 34.9 34.9 34.9
STEM LENGTH 35 35 35
CRANK LENGTH 160 160 160
M L XL
STACK 635.25 644.34 649.05
REACH 455.07 485.05 514.92
HEADTUBE ANGLE 63.6° 63.6° 63.6°
HEADTUBE LENGTH 115 125 130
TOPTUBE EFFECTIVE 590.37 625.6 658.39
SEATTUBE ANGLE 78.8° 78.5° 78.3°
SEATTUBE LENGTH 410 420 430
BB HEIGHT 344 344 344
BB DROP (REAR/FRONT) 15/32 15/32 15/32
CHAINSTAY 443 443 443
WHEELBASE 1263.17 1297.42 1329.04
STANDOVER HEIGHT 705.08 713.97 725.29
FORK OFFSET 44 44 44
SEATPOST DIAMETER 34.9 34.9 34.9
STEM LENGTH 35 35 35
CRANK LENGTH 160 160 160

All lengths in millimeters

Suspension Setup

REAR SHOCK SETUP

Recommended Sag = 30%/19.5mm

Step 1: Use your finger to slide the rubber bump stop (on the shock shaft) up to the seal head.

Step 2: Sit on the bike and put all of your weight on the bike. Do *not* cycle the suspension.

Step 3: Measure sag (from shock body to bumper), If it does not match the bike’s recommended sag in millimeters repeat process, and replace coil spring with appropriate rate.

Step 4: 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 manufacturer.

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 DHX2

Rider weight and shock setup
LBS KG COIL LB/IN
120 54 400
130 59 400
140 64 400
150 68 450
160 73 450
170 77 450
180 86 500
190 86 500
200 91 500
210 95 550
220 100 550
230 104 550
240 109 650
250 113 650
260 118 650
270 122 650

Reviews

Marin have created a product that anyone can ride and enjoy and come back with a smile on their face, and not break the bank.

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