Intradrive GD8: Electric motor with integrated manual gearbox from Scotland
Florentin Vesenbeckh
· 24.07.2025
With the GD8, the Scottish manufacturer Intradrive is presenting a potential competitor to the popular MGU from Pinion (tested here) on its feet. At first glance, it looks as if the compact engine-transmission unit from the island could actually develop into a real alternative.
Unlike conventional e-bike drives, the GD8 (Gearbox Driveunit 8-speed) combines the motor and gearbox in a compact, fully sealed unit. According to the manufacturer, this integration should enable a clean and modern bike look as well as a simplified design for bike manufacturers.
Compact design for modern bike aesthetics
The GD8 system is compatible with chain and belt drives, allowing flexible integration into various bicycle concepts. By eliminating the need for a classic derailleur system, Intradrive promises a low-maintenance riding experience and greater long-term reliability. Readjusting the gears? No longer necessary!
The compact design is also intended to give the bike a clean look, which is particularly important in the premium segment. The decision to adopt the mounting points of an already established e-drive is a smart one: The screw-on points are identical to those of the Shimano EP8.
Speaking of looks: From the side, the Intradrive GD8 motor-gearbox unit looks even slimmer than the already compact MGU from Pinion. However, the Scottish counterpart is wider. This results in a wider Q-factor of 190 mm. The Pinion MGU has a slim 174 mm.
Technical details of the drive system
At the heart of the GD8 system is the drive unit with integrated gearbox. According to the manufacturer, this delivers a peak output of 700 watts and a maximum assistance of 400 per cent. The electronically controlled 8-speed gearbox is said to cover a gear ratio range of 480 per cent - which is slightly less than the standard e-bike drives with 12-speed gears from Shimano (510%) and Sram (520%).
The Pinion MGU with 12 gears is even higher in direct comparison, with a gear range of 600 %. The GD8 system is said to change gear in around 0.1 seconds. Intradrive states the total weight of the drive unit at 4.5 kilograms.
Focus on durability and reparability
According to Intradrive, a particular focus in the development of the GD8 system was on durability and repairability. This has always been a speciality of bicycle gearboxes. The company emphasises that the system is designed in such a way that it can be repaired in the event of a defect.
The aim is to make a contribution to the circular economy and extend the service life of e-bikes. This focus on sustainability and longevity is likely to attract particular interest in the premium segment, where customers are increasingly focussing on long-term usability and ecological aspects.
In a nutshell: The Intradrive GD8
- Weight: 4.5 kilogrammes
- Rated power: 250 watts
- Peak power: 700 watts
- Number of gears: 8
- Ratio range: 480 per cent
- Electronically controlled gear changes
- Switching speed: approx. 0.1 seconds
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Target group and market positioning
With the GD8 system, Intradrive is clearly targeting the premium segment of the e-bike market. The integrated design, high performance and focus on durability should appeal to bicycle manufacturers who produce high-quality e-bikes for discerning customers - especially for mountain bike use. However, the system can also be used flexibly for urban use or on commuting routes and can be customised for different types of bike. The first production bikes are due to be launched on the market in 2026.
Florentin Vesenbeckh
Editor CvD
