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E-Bike with 120 mm Suspension

“E-TOURMALINE. Tailor-made bike frame with Electric Motor Technology.”


The E-TOURMALINE is our new electric mountain bike hardtail. The electrified frame was developed in combination with the high-performance engine EP3+ of POLINI in Italy. This set-up offers a solid but still very light package for efficient and long lasting cycling performance with a maximum power output of 90 NM. The battery provides energy for approximately 120 kilometers on flat courses and up to 1,250 to 1,500 meters of climbing if you are riding on hilly courses. The frame allows easy battery changes due to a removable service lid..

As with other KONSTRUCTIVE full custom frames, we can offer individual design options, custom frame sizing and features..

The carbon frame has a similar look and still a light feel like the non-motorized TOURMALINE model. Tube shapes and profiles are optimized for high strength and light weight. With the POLINI engine the complete bike’s weight is just above 15 kg.

Our standard frame geometry is optimized for good handling in a wide variety of trail situations. Climbing steep sections is supported by a special chainstay geometry. The modern frame geometry with longer reach and slacker head angles will help riders descending on the E-TOURMALINE safely on steeper sections..

The E-TOURMALINE is the ideal companion if you would like to cover a lot of ground in a short amount of time.



Size / Bike weight: Medium / 15,69 kg

Design Styles: Konstructive Pure Carbon & Blau Lasiert

Dream-Bikes for Dream-Rides

Custom Bikes offer more fun than standard bikes. Take our word for it. We have been riding them for 30 years.

• Most advanced fabrication methods
• POLINI EP3+ Engine (90 NM), High Performance Battery (500 Wh)

• Developed in Germany, handmade in Europe
• Custom sizes and tailor-made frame building with individual features available
• Custom colour and graphic design options available
• Excellent stiffness-to-weight-ratio
• Large selection of configurable options to create the ultimate Dream Bike

Ideal for



Advanced Cycling Skills and Endurance Training Programs are the perfect addition to your Dream Bike!


Our Master Craftsmen build High-Performance Bicycle Frames with Premium Steels and Advanced Carbon Composite Materials from Europe.

Frame Geometry

Frame sizeSMLXL
Seat TubeA390430480530
Effective Top TubeB580600620646
Seat Tube AngleSa74°74°74°74°
Head Tube AngleHa69°69°69°69°
Chainstay LengthC430430430430
Horizontal ChainstayHC425425425425
Head Tube LengthS90100110120
Fork LengthF495495495495
Reach R409427443467
Measured in millimeters

Specifications and Frame Details

Modern and optimized frame tubes from composite materials specific to load
Carbon frame design for POLINI EP3+ E-Bike Motor
Frame design with sloping top tube for low frame weight and great handling characteristics
Compatible with rigid forks with tapered steerer tubes
Developed in Berlin; Germany; handmade in Europe
Low frame weight. 1.580 g in size medium
Load-specific carbon-layup; HR40 / M30
Durable 3K carbon-layup surface
Post-mount disc mount inside of rear triangle for 160mm discs
Internal shift-cable routing through down-tube. Easy service through service-port in front of the bottom bracket
Tire clearance for 2.35 inch tires (tested with Schwalbe Nobby Nic tires)
Removable derailleur hanger
Tapered head tube from 1 1/8“ to 1.5“; fully integrated (Campy style)
31,6 mm seatpost diameter; 400 mm length recommended
Seatpost clamp with 35 mm diameter
No derailleur option
Compatible with 1 chainring systems only
Compatible for example with SRAM XX1; chainring up to 34 teeth
ISIS crank arm interface
Rear axle system: 142 mm x 12 mm or 148 x 12 mm through axle
Pure carbon with clear coat for the most robust and lightest surface
Custom colors are available for our Custom Dream Bikes
Konstructive Carbon-frames are completely repairable. In the Konstructive carbon lab we can also repair frames from other manufacturers
Subject to change without notice

Dream-Bike Manufactory

Configure your ultimate Dream Bike. Our Konstructive Dream Bike Consultants will help you to select the right components and wheelsets from the best premium manufacturers. Based on your personal preferences we will design the look of your bike. Individual paint schemes and graphic designs are available for frames, forks, components as well as wheel systems. You can choose any component and groupset for your drivetrain, shifting and braking system that the market has to offer. We assist you in finding the best parts for your field of use and cycling goals. Just contact us any time to start your Dream Bike project.

Dream-Bike Configuration Tool

We create bikes based on your body dimensions, wishes and personal preferences.

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