21. December 2020

The R.X750 ULTRA in the high-end test

"One for everything", under this motto the magazine EMTB had set out to find the perfect super all-rounder and invited the new ROTWILD Big Mountain in its top equipment to test for the 06-2020 issue. The eight high-end fullys from comfortable touring bikes, fun-oriented trail bikes to enduro bolides, are supposed to combine a lot of suspension travel, robust attachments and good climbing characteristics. Whether the ROTWILD R.X750 ULTRA would succeed in convincing the high-end test field, the test editors wanted to find out on extended tours with technical, steep climbs and challenging descents.

Frame building competence sets standards

Within the ROTWILD Extensive Series, the R.X750 ULTRA not only sets new standards in terms of lightness, but "once again proves frame construction expertise," says the EMTB. We had revised the big mountain bike with 150 mm travel in important areas for the 2021 model year to further optimize the overall weight and reduce it to under 22 kg. The handmade full carbon frame of the R.X750 ULTRA from high-modulus carbon fibers (HM) saves weight and provides high strength as well as stiffness for more performance of the bike. Also the linkage, the new battery housing and attachments such as handlebars and wheels are made of carbon. This makes the ROTWILD the second lightest bike in the test despite the larger battery.

For the first time in the R750 series, we use high-modulus carbon fibers (HM) in the R.X750 ULTRA, which saves weight on the frame. At the same time, high strengths and stiffnesses are maintained. The high-quality materials are deliberately made visible here.

The combi of motor and battery provides a very strong reach height

Support continues with the powerful Brose Drive S-Mag motor. Comparing the motors within the test group, EMTB states: "The character of the Brose drive is determined by its enormous torque. At low cadence, it pushes harder than the competition. The coasting at the 25 km/h limit is also excellent. ROTWILD combines the motor with a 750 watt-hour battery. The package delivers a very strong reach."

Whether support level, battery status, speed - even in difficult lighting conditions, the Brose Allround Display is easy to read and simple to operate.

Low total weight for more agility

The modern, sporty geometry is designed for efficiency: a low top tube, 66° steering angle and 74° seat angle, as well as the extended reach - this offers the rider the best freedom of movement and agility. The testers also note this effect positively on the trail: "The bike's handling is very balanced, fun and agile. The lightweight wheels and low overall weight contribute to this just as much as the successful, not too extreme geometry with quite short chainstays."

High-end parts such as the Shimano XTR 12-speed drivetrain or the DT Swiss HXC1200 carbon wheels offer the best performance and also reduce the total weight of the bike to under 22 kg (in size L).

Fun on trails and downhill

High up in the big mountains and then downhill with fun in alpine terrain: To offer uncompromisingly good handling on demanding routes, that was the goal in the development of the chassis. How well this has succeeded is confirmed in the test: "Very good pilots as well as leisurely riders have a lot of fun with it on trails and descents. The rear end works super sensitive and swallow-joyful, the strong tires and brakes give additional security. Downhill, the ROTWILD is one of the most balanced candidates."

New is the carbon linkage, used in a rear triangle with improved efficiency and 150 mm travel. Enlarged industrial bearings protect the damper from lateral forces, the ball bearing Trunnion Mount recording increases the longevity of the spring element.

Rating: Super with 367 points

As a test conclusion, the EMTB summarizes: "The R.X750 ULTRA comes very close to the ideal of the all-rounder: top reach height at low weight, comfortable and safe on tour, fun on the trail. The price is steep."
The entire test is published in the 06-2020 (December/January) issue of EMTB.
All details about the R.X750 ULTRA are available here.