Here comes Lumen, Scott's super-light e-trail bike
Since Scott has been involved in the e-mountain bike market, the Spark has always been the model for the pedelec version. The new Spark is no exception, except that its electronically powered brother is no longer called E-Spark, but Lumen. With consistent system integration as the key to a slim e-mountainbike, the Lumen eRIDE is barely recognizable as an e-bike. The little that can still be seen of the TQ motor is hidden behind the crank and chainring, otherwise it is only the neatly integrated display and the remote control that reveal the additional power. Whereas the first E-Spark had 57 percent more volume than the Spark, the Lumen only has 17 percent more volume compared to the current Spark. With a weight of just 15.5 kilograms, the E-Trail bike opens up a new segment in Scott's e-bike portfolio.
The world champion bike as a template
With 130 millimetres of suspension travel, it made perfect sense for Scott's engineers to use their proven Spark 900 platform. After all, the Spark has already proven itself in racing. Nino Schurter has already become world champion twice with it.
The frame design already has some advantages thanks to the integrated shock, such as space for water bottles or range extenders. Of course, the Spark could not be adopted one-to-one. The requirements for an electric system necessitated a number of adjustments, starting with the thickness of the carbon layup, the kinematics, the shock positioning and the geometry. Last but not least, the design of the Lumen was optimized for the motor and battery.The integration of the suspension strut has the further advantage that the center of gravity is as low as possible. This results in better handling and a more stable ride. The geometry also ensures the latter. The steering angle of the Lumen is set at 65.5 degrees, but can be adjusted to personal preference. Without removing the cables running through the headset, the bearing shells can be rotated 180 degrees in both directions, making the steering angle 0.6 degrees slacker or steeper. Depending on the frame size (S to XL), the seat angle is between 76.8 and 77.5 degrees, the reach is 446 millimetres for size M and the chainstays are 450 millimetres, which is roughly what you would expect from modern geometry.Powerful, light and quiet
Scott invested a year in finding the right partner for the drive. The German company TQ, which specializes in electrical components for a range of industries, including aerospace, robotics and medical technology, turned out to be perfect. The HPR50 e-bike drive weighs just 1.8 kilograms, but delivers 250 watts with an output of 50 Newton meters of torque.
"The aim here was for the motor to convey a natural riding experience. It should also make you forget that you are sitting on an e-bike," says TQ. An innovative transmission system works on its eight-centimeter diameter. This enables the small size, while at the same time increasing the accuracy of the system and reducing noise. Furthermore, it is said to respond finely and smoothly and therefore impress with a natural ride feel. Another plus: when the motor is off, the Lumen can be ridden almost like a normal bike.
The little powerhouse is powered by the integrated 360 watt-hour battery. As mentioned, the frame has space for two water bottles, whereby the front holder can also be used for the range extender. This delivers a further 160 watt hours, packed in the smallest size available.
The system is controlled via a minimalist remote control, which is connected to the integrated display in the top tube. The support modes are easy to switch through and, thanks to the ergonomic placement on the handlebars, can be easily changed while riding or in walk mode. The LED display shows all the important information, such as the battery level, the remaining range and even the wattage. Connectivity with other systems is also provided. Connected via Bluetooth, the data can also be displayed live on the watch, or the motor can be adjusted to personal preferences via the TQ e-bike app on a cell phone. With the built-in ANT+, the system can be easily connected to bike computers from Garmin, Hammerhead or Wahoo.
Suitable Ride Brandguides
Further content on this article
Note: This content has been automatically translated from German. Please report any incorrect translations.