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Alpine Trail E2 Bosch

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Marin Alpine Trail E2 Bosch studio profile.

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  • Price: *
  • Suspension: Fox 38 Performance Elite/Fox DHX2 Performance Elite
  • Wheel Size: Mixed 29"/27.5"
  • Frame: Aluminum
  • Size Range: 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.

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
Range
31-78 miles / 50-125km*
Rider app
Bosch eBike Flow

Highlights Disclaimers

* Based on rider weight, terrain, climate and level of assistance used.

The 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.

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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

  • 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 (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

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

Technology

Alpine Trail E2 Bosch frame detail.

SERIES 4 ALUMINUM FRAME

Alpine Trail E models are built upon our 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, compatible with modern coil or air shocks.

Alpine Trail E2 Bosch MultiTrac 2 LT suspension detail.

MULTITRAC SUSPENSION

Marin developed the all-new Series 4 aluminum frame in conjunction with the new human-powered Alpine Trail models and notable new features shared between the platforms. Firstly, travel has been increased by 10mm at both ends, now standing at 170mm (f) and 160mm (r), which is also an increase of 10mm beyond the current Shimano-equipped models. MultiTrac 2 LT (“Long Travel,” 150mm+), with rear pivots relocated from the seatstays to chainstays, makes its eMTB debut and delivers the suspension performance and tunability demanded of the longer travel. 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. Furthermore, relocation of the pivots provides the added benefit of allowing for adjustable chainstay lengths and bottom bracket heights. Ultimately, it’s a better-riding, better-performing suspension system made possible by the new pivot placement.

The Shimano-equipped Alpine Trail E features the same great, proven MultiTrac suspension technology, but optimized for the Shimano STEPS system. With this combination there is no need for platform or lockout levers, just get on and blast up the hills. 160mm front/150mm rear travel.

Marin Alpine Trail E2 chainstay flip chip.

ADJUSTABLE GEOMETRY

Adjustable geometry features are new to the 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.

Alpine Trail E2 Bosch rear 3/4.

MIXED WHEEL SIZES

29” front and 27.5”+ rear wheel sizes are the ideal combination for the Alpine Trail E, with larger front wheel easily rolling over most any trail obstacle and offering the best cornering traction, while the burly 27.5” rear setup adds playfulness and enhances acceleration and braking traction.

Marin Alpine Trail E Bosch downtube guard.

PROTECTION

Shimano models: A stout and durable rubber guard protects the chainstay, while a durable and replaceable guard on the leading edge of the drive unit keeps the internals safe from whatever the rider is likely to kick up on the trail. CushCore inserts enhance tire performance and traction while also protecting the rims on the Alpine Trail E2 and E1 models.

Bosch models: Chainstays and seatstays are protected with durable rubber guards that minimize noise and protect paint finishes. Made from a 30% fiberglass-infused nylon, similar to what is used on safety and football helmets, the moto-inspired integrated downtube guard helps deflect errant rocks, logs, or anything else riders may encounter on the trail. This guard also includes drain ports to let moisture flow from the frame. 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. Out at the wheels, CushCore inserts enhance tire performance and traction while also protecting the rims on both models.

Detail image of Shimano STEPs battery on Alpine Trail E mountain bike

SERIES 4 ALUMINUM FRAME

Alpine Trail E models are built upon our 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, compatible with modern coil or air shocks.

Detail shot of Alpine Trail E2 rear shock

MULTITRAC SUSPENSION

The Alpine Trail E features the same great, proven MultiTrac suspension technology, but optimized for the Shimano STEPS system. With this combination there is no need for platform or lockout levers, just get on and blast up the hills.

Profile image of Alpine Trail E

MIXED WHEEL SIZES

29” front and 27.5”+ rear wheel sizes are the ideal combination for the Alpine Trail E, with larger front wheel easily rolling over most any trail obstacle and offering the best cornering traction, while the burly 27.5” x 2.8” rear setup adds playfulness and enhances acceleration and braking traction.

Detail image of dropper post on Alpine Trail E

DROPPER POST OPTIMIZED

The modern day trail rider needs their saddle out of the way at times, while low-slung frames require longer length posts. On the Alpine Trail E, seat tube lengths have been minimized, along with minimum insertion depths, so that riders of all sizes can get the proper extension needed.

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 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 air pressure
LBS KG COIL LB/IN
120 54 400
130 59 400
140 64 400
150 68 450
160 73 450
170 77 450
180 82 500
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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