Marin Alpine Trail E2 Bosch 2025 Electric Bike

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.

Technology

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.

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.

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.

Mixed 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.

Specifications

Frame and Forks

• Frame: All New Series 4 6061 Aluminum
• Forks: Fox 38 Performance Elite, 170mm Travel, 29" , 110 x 15mm Boost Kabolt Thru-Axle, 44mm Offset, Integrated Fox Fender
• Rear Shock: Fox Float DHX2, Performance Elite, Low Speed Compression and Rebound Adjustment, 205 x 65mm, Trunnion Upper Mount, 30mm x M8 Lower Mount, Medium Spring Rate = 450lb, Large Spring Rate = 500lb, X-Large Spring Rate = 550lb

Drivetrain

• Crankset: e*thirteen e*spec Plus, 160mm Length
• Rear Derailleur: Shimano XT 12-Speed, SGS
• Cassette: Shimano SLX M7100 Cassette, 12-Speed, 10-51 Tooth
• Chain: KMC E12S, E-Bike Specific Chain

Braking/Shifting

• Front Brake: TRP DH-R EVO 4-Piston Hydraulic Disc, 203mm, 2.3mm Thick
• Rear Brake: TRP DH-R EVO 4-Piston Hydraulic Disc, 203mm, 2.3mm Thick
• Brake Levers: TRP DH-R EVO Hydraulic

Wheels

• Front Hub: Shimano FH-TC500, 110 x 15mm, Centerlock, 32 Hole
• Rear Hub: Shimano HB-TC500, 148 x 12mm, Centerlock, Standard Freehub Body
• Rims: 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
• Tyres: Vee Tire Co Attack HPL, E-Control Compound, Front 29 x 2.5", Rear 27.5 x 2.5"

Finishing Kit

• Handlebars: Marin Mini Riser, 6061 Double Butted Aluminum, 780mm Width, 28mm Rise, 5º Up, 9º Back
• Grips: Marin Grizzly Lock-On
• Stem: Marin 3D Forged Alloy, 35mm
• Seatpost: TranzX, YSP39 1x Remote, 34.9mm Seatpost Diameter, Travel Small = 150mm, Medium / Large = 170mm, X-Large = 200mm
• Saddle: Marin Speed Concept

Electric Power

• Motor: Bosch Performance Line CX, 85Nm, 20mph (US, NZ)/25 km/h (Rest of World) Top Assisted Speed
• Battery: Bosch PowerTube 750 Wh
• Display: Bosch BRC3100 Systems Controller