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New 17 kg TRANSALPES E1 eMTB featuring the new compact 30 Nm MAXON Bikedrive Air system

With the new E1, Swiss bike brand TRANSALPES introduce their first eMTB, equipped with the equally new and lightweight 3.5 kg MAXON BikeDrive Air system. The light eMTB made a very promising first impression at Eurobike 2021, weighing just 17 kg. Read on for all the details!

TRANSALPES E1 | Maxon Bikedrive Air 220W, 30 Nm | 250 Wh | 160/145 mm travel (f/r) | 29″ | 17.2 kg (size M according to the manufacturer’s specs) | CHF 13,000 | Manufacturer’s website

The Swiss bike brand from Zwillikon present their first eMTB, based on the TRANSALPES C2. Undoubtedly, their goal in developing the E1 was to make a light eMTB that offers a natural riding experience. They seem to have achieved the former as the complete trail-ready eMTB weighs just over 17 kg and a lighter build with less robust components should come in at just under 16 kg, according to TRANSALPES. Speaking of builds, the E1 can be freely configured via the in-house configurator, as with all of the bikes from TRANSALPES, though the Swiss brand will also be offering preconfigured models. One of them is the Swiss Edition, which is expected to be available in December.

TRANSALPES E1 Swiss Edition | Maxon Bikedrive Air 220W, 30 Nm | 250 Wh | 140/130 mm (f/r) | 29″ | 16.8 kg (size M according to manufacturer’s specs) | CHF 8,999 | Manufacturer’s website

The Maxon Bikedrive Air motor system in detail

Maxon Bikedrive Air is the first mid-mounted ebike motor from the Swiss Maxon Group. They specialise in the development and manufacture of small high-precision motors and drive systems. The new Maxon Bikedrive Air system relies on a small mid-mounted motor that delivers up to 30 Nm torque and a maximum power output of 220W.

The motor of the Maxon Bikedrive Air system offers a maximum power output of up to 220 W and up to 30 Nm torque. It can be tuned via the in-house app.
The 250 Wh battery requires tools to be removed. For longer tours, Maxon also plan to offer a 250 Wh range extender from 2022. It will fit in the bottle cage and get connected to the motor via the charging port.

The light motor is powered by a 250 Wh battery, which is firmly integrated into the down tube of the TRANSALPES E1. In addition, an external 250 Wh range extender should be available from 2022, weighing around 1.2 kg and fitted to the bottle cage.

There is an opening in the down tube through which you can see the motor and battery.
While riding, there’s a cover to protect the system, though it wasn’t yet attached to our exhibition bike.

There’s a minimalist LED display integrated into the top tube to show the current support mode and battery level. The equally minimalist remote is supplied by Zirbel.ch and is a haptic dream! If you want more ride data, the system features ANT+ or Bluetooth connectivity for third-party displays and bike computers. Thanks to the MAXON app, the power and torque output of the BikeDrive Air motor can be fine-tuned. However, the app is still a beta version.

The integrated display in the top tube shows the battery level and three support modes.
You can choose from one of the three available support modes via the inconspicuous remote on the handlebar. The Zirbel.ch lever is easy to use and is a haptic dream, confirming your action with a clearly defined click!
The motor can be tuned via the in-house app. However, the it’s still a beta version as the usability is being refined.
If you would like additional information while riding, you can easily connect a Garmin, Sigma or other common bike computer via Bluetooth (BLE) or ANT+.
The motor is neatly integrated into the frame of the TRANSALPES E1 and almost silent while riding. It delivers up to 30 Nm torque and a maximum power output of 220 W.
The charging socket is integrated into the down tube of the TRANSALPES and protected by a plastic flap.

The geometry of the new TRANSALPES E1 at a glance

The new TRANSALPES E1 light eMTB will initially be available in sizes S, M and L. That said, frame size L is already very large with a reach of 495 mm. This is combined with a moderate stack height of 633 mm and a seat tube length of 460 mm. The seat tubes are quite short relative to the reach across the board. The chainstay length remains the same for all sizes and measures 448 mm.

The geometry of the new 160/145 mm travel TRANSALPES E1:

Size S M L
Top tube 599 mm 629 mm 662 mm
Head tube 95 mm 105 mm 120 mm
Seat tube 360 mm 410 mm 460 mm
Head angle 64.6° 64.6° 64.6°
Seat angle 76.1° 76.1° 76.1°
BB Drop 23.5 mm 23.5 mm 23.5 mm
Chainstay 448 mm 448 mm 448 mm
Wheelbase 1,201 mm 1,235 mm 1,271 mm
Reach 436 mm 466 mm 495 mm
Stack 609 mm 619 mm 630 mm

Using the same frame platform, TRANSALPES are also offering a model with 140/130 mm travel, though it is significantly longer with a 505 mm reach in size L:

Size S M L
Top tube 599 mm 629 mm 662 mm
Head tube 95 mm 105 mm 120 mm
Seat tube 360 mm 410 mm 460 mm
Head angle 65.5° 65.5° 65.5°
Seat angle 77° 77° 77°
BB Drop 30 mm 30 mm 30 mm
Chainstay 448 mm 448 mm 448 mm
Wheelbase 1,192 mm 1,226 mm 1,262 mm
Reach 445 mm 475 mm 505 mm
Stack 603 mm 612 mm 625 mm

The variants of the new TRANSALPES E1

The E1 will be available in two variants, one with 140/130 and one with 160/145 mm travel. Both models rely on the same frame and roll on 29″ wheels. The components can be individually adapted to suit the customers’ requirements via the bike configurator.

Our first impression

It looks like there’s a new threat on the horizon for the Specialized Levo SL as the TRANSALPES E1 not only features similar technical specs but also impressed us in terms of feel, looks and motor integration. We can hardly wait to put the new bike, motor and app to the test on the trails. It will be available from December. The only downside is that the bikes will initially be exclusive to Switzerland…

Further information: transalpes.commaxonbikedrive.com


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Words & Photos: Peter Walker

About the author

Peter Walker

As a technical editor, Peter is as much a man of action as he is of words. This expert, screw-driver-flexing two wheeled-whizz has many envy-inducing characteristics, including a background in motocross, several EWS race plates to his name, and more than 150 recorded days at Whistler Bike Park. However complex the bike and however steep the trail, he’s probably already nailed it, twice. Oh, and he can do it all on skinny tyres too. When it comes to guiding consumers, Peter cut his teeth at Vancouver’s oldest bike shop and now puts pen to paper on the daily translating this know-how into our editorial plan. When not tearing up Stuttgart’s local trails while testing bikes, he loves nothing more than loading up his self-renovated VW T5 and hitting the road. The fact that he’s a trained paramedic gives his colleagues reassurance out on the trails. So far we haven’t had to call him by his alias ‘Sani Peter’, so here’s hoping he keeps it right side up for the rest of his time here!