With the R.X275, ROTWILD combines a unique riding experience with innovative technology and a completely new drive approach. "The linchpin is the principle of the Boost Button developed by us," explains ROTWILD Managing Director Peter Schlitt. This is a ring that is harmoniously integrated into the newly designed cockpit, which the rider can use to call up an extra portion of thrust. "The focus of the R.X275 is clearly on the rider's own rhythm. It is the driving force. The motor provides constant and subtle support," emphasizes Peter Schlitt. "For those moments on the trail when thrust and support are needed, the rider releases extra energy completely intuitively via the boost button. Just like operating the gears and seat post." For a maximum of 30 seconds and as long as the button is pressed, up to double the rider's own power is available, up to a maximum of 300 watts. "Our target group is athletes who follow an individual training plan and whose focus is on permanently increasing their own performance," says Peter Schlitt. "That's why we call the R.X275 the athlete. Our approach during development was to create a very light trail bike with eAssist. The concept with the Boost Button allows us to find exactly the right balance between biological power and support. We have reduced everything to get the maximum riding experience," emphasizes Peter Schlitt proudly.

eAssist symbiosis with 250 watt hours and TQ technology

The power of the R.X275 is contained in the Integrated Power Unit, the IPU275, which consists of the battery developed by ROTWILD itself and effectively delivers 250 watt hours. The energy storage unit is made up of modern 21700 cells and is firmly integrated into the down tube. "The specially programmed motor control software regulates the energy management. It ensures optimum meshing of the battery and drive", says Johannes Matschos, Product Manager at ROTWILD. The motor used is the HPR50 from TQ with a maximum torque of 50 Nm. "We decided to work with TQ on this concept because we see it as the ideal tool for combining our approach of lightness with efficient power assistance," explains Johannes Matschos. The TQ motor supports three riding profiles. "Changing the modes while riding is not the style with which the rider moves the R.X275. You do that on the display before you start. We have integrated this into the top tube. Additional support is provided via the Boost button," says Johannes Matschos. Users can customize the individual profiles via the TQ app.

Frame and kinematics underline the lightness system

Everything in the R.X275 is designed for lightness. "We looked at many areas to see how we could save weight and then adapted the design accordingly," says Johannes Matschos. The bike therefore has a total weight of 15.3 kg in the Ultra version and size M. One of the decisive factors for the light weight is the frame. It weighs 2,350 g in size M. It is made entirely of carbon in high-modulus fiber and is handcrafted. The handlebars are also made of carbon fiber. In the Ultra version, the handlebars and stem are fused together to form a fully integrated cockpit. This consequence of the lightweight design is continued in the rear triangle. Flexible carbon seat stays are used there. ROTWILD also does not use any additional bearings to save weight. The Short Travel kinematics with 130 mm travel at the front and 120 mm at the rear ensure agile handling and strong grip. The 437 mm chainstays underline the compactness of the bike. The R.X275 also rolls on 29" wheels. For the first time, the manufacturer has also fitted a universal UDH derailleur hanger. There are also two holders in the frame: for drinks bottles or a range extender.

The R.X275 is available in the Pro (EUR 9,499) and Ultra (EUR 12,499) versions and four frame sizes (S, M, L and XL).

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