When Vision Meets Precision

At ROTWILD, Lutz is in charge of concept and design – but for him, that means engi-neering and philosophy, not just form and color. His process doesn’t start with numbers and data, but with a feeling, the terrain, and the ride itself. “You can’t build a good bike if you don’t ride with ambition,” he says. “You need to feel it.” If you don’t know how poor suspen-sion kinematics behave on a trail, you can’t create a bike that riders can truly trust. If you never push the limits, you’ll never design a bike that’s uncompromising.

But when people hear the name ROTWILD, they don’t just think of engineering and aes-thetics – they think of freedom. Of being out there: in the mountains, on muddy trails, with dust on your glasses and adrenaline in your veins. That’s what the R.EX is built for. Not a product born in Excel, but a tool for real experiences. A bike that breathes speed, inspires confidence, and delivers power and speed. In Lutz’s words: “What drives me is building something that climbs better and descends better. Safer. More confident.”

With the R.EX, we set ourselves a bold goal: to create an e-MTB that makes no com-promises – uphill or down. A bike that performs on home trails but doesn’t back down in the high alpine. A machine that embodies what our brand stands for: engineering as an attitude, not a showpiece. Vision as a foundation, not just a buzzword. And everything this bike achieves starts in the mind – or on paper, with a pen in hand and coffee in reach.

“Progress and innovation have to be seen as a whole,” Lutz says. “It’s a composition.” For the R.EX, that means the frame, battery, motor, and suspension system are all developed as a single integrated unit – not just a collection of components. The self-developed IPU – the Integrated Power Unit – is not just a battery, but an integral part of the overall concept right from the start. This philosophy continues in the frame design and suspension layout. Lutz calls it the Mid-High Pivot System – a radical new approach to rear suspension. The main pivot is moved to an unconventional position. “The kinematics are incredibly efficient, both climbing and descending. Under pedal load, under torque, under lateral stress – it’s super stiff. But when you hit side impacts – like a slipping rock – it can flex torsionally. That means grip.” And grip means confidence.

This isn’t theory. It’s the result of test rides, debates, trial and error. A process that’s never linear – but always alive.

Precision

At ROTWILD, bike development doesn’t end with the design – it really starts there. Lo-renz Mack, Technical Product Engineer and the man behind the fine-tuning, puts it simply: “It’s not like a bolt of lightning hits and suddenly you’re building a different bike. It’s a pro-cess of constant evolution across all areas.”

For Lorenz, the R.EX is the result of years of experience – and at the same time a plat-form for future ideas. The geometry was refined to offer more stability without losing play-ful handling. The mullet setup – 29-inch wheel up front, 27.5 in the rear – makes the bike more agile without becoming twitchy. The seat angle is steeper, the stack higher. The Acros Mod System allows fine-tuning of head angle and reach – ideal for riders who know exactly what they want.

None of these choices were made on a whim – and yet they feel intuitive. Because they stay focused on one goal: flow. That feeling when a trail isn’t something you fight, but some-thing you read. When your bike doesn’t just respond – it anticipates. “The rear end is super sensitive,” says Lorenz. “And thanks to the geometry, the bike reacts incredibly well to direc-tion changes.”

For the drive unit, we went with serious muscle: the DJI Avinox – a powerful motor with brains to match. “The software lets you tune the entire system exactly to your needs,” Lo-renz says. The battery is lighter – with more watt-hours. And the new Push+ system makes it side-removable. Sounds like convenience – and it is. But most of all, it’s smart. Like every detail on this bike.

ROTWILD pushes precision even further: the SRAM Transmission drivetrain communi-cates directly with the motor, creating a whole new shifting experience. The Eightpins seat-post is now fully integrated – for cleaner aesthetics, better performance, and increased du-rability. New cable ports simplify installation and reduce noise. Even the shock mount has been reengineered – using a sliding bushing instead of a standard mount, making setup eas-ier and boosting precision.

What does all this add up to? A bike that works. Not just on paper, but on the trail. For Lorenz, the R.EX isn’t just another project: “Honestly, it’s the one I grab every day. It’s the classic all-purpose weapon.”

And that’s exactly what we set out to build. A bike for ambitious riders. A bike that in-spires without intimidating. Technically advanced – yet never complicated.

At the end of the day, the R.EX is above all one thing: a statement of our approach to Enduro. An approach that says: we don’t stand still. We move forward. We draw, we think, we evolve. Every day. With coffee. With a pen. And with the belief that a truly great bike isn’t just built – it’s imagined first. It takes vision – and the precision to bring it to life. Only when both come together does something emerge that is more than just technology. Some-thing that moves you.

Or as Lutz puts it: “We never – never ever – stand still.”