The BMW R 12 and R 18 Speed Sisters aren’t just custom bikes, they’re bold expressions of character, craftsmanship, and creativity. Born in the Bavarian Forest and brought to life by [WOIDWERK], these custom builds prove that personality can be engineered. Their debut at BMW Motorrad Days 2025 in Garmisch wasn’t just a reveal, it was a statement.
WOIDWERK Brings the Speed Sisters to Life
The Speed Sisters project started with a clear goal: to reinterpret the BMW R 12 and R 18 as a connected duo, but with distinct personalities. “Sisters, not twins” became the theme. Both bikes share a visual language but wear their individuality with pride.
WOIDWERK founder Ralf Eggl guided the project, merging design precision with deep-rooted Bavarian inspiration. BMW Motorrad supplied the base bikes, but it was Eggl’s vision that turned them into showstoppers.
BMW R 12: The Agile Little Sister
The R 12 custom emphasizes agility and sportiness. A shortened bobber-style rear end, low stance, and a redesigned handlebar setup give it a compact and athletic feel. Its leather and Alcantara seat, custom 3D-printed tank cover, and raised chassis with Wilbers suspension all contribute to a dynamic ride.
A black ceramic-coated Hattech exhaust system adds subtle aggression, while aircraft-inspired sequential taillights from Kellermann blend into the tailor-made rear cowl. Every angle shows movement, even at rest.
BMW R 18: The Bold Big Sister
While the R 12 leans into lightness, the R 18 commands attention. The tank was reshaped and lifted by 30 mm. A floating seat and hand-built “Targa hoop” bring a sleek and muscular profile to the table. It’s a design meant to dominate.
Wilbers suspension raises the stance by 20 mm, adding presence. The upgraded braking system, taken from the R 1300 GS, features 320 mm discs and radial calipers, delivering serious stopping power and performance precision. Black ceramic exhaust tips round out the assertive feel.
Performance That Matches Their Style
Both bikes aren’t just visually upgraded, they’re reengineered for performance. The raised chassis setups make for more responsive handling. The exhaust systems enhance flow and soundtrack. And thanks to premium components like the Wilbers shocks and high-spec brakes, the riding experience now reflects the custom looks.
WOIDWERK didn’t just dress these bikes up, it gave them a voice, a stance, and a ride to match their attitude.
A Color Story from the Bavarian Forest
The signature paint scheme blends white and green, a tribute to the Bavarian Forest’s moody seasons. The ratio? Three-quarters white, one-quarter green. It’s a clever nod to the region’s long winters and quick summers.
The color theme runs through the seats, fairings, and subtle design details, right down to the tinted screens. It’s a color story with humor and heritage woven into every brushstroke.
More Than Just Custom Builds
The Speed Sisters project captures the essence of modern customizing. It’s not only about bold shapes or powerful components. It’s about storytelling, soul, and a strong connection to the brand’s roots.
For over a decade, [WOIDWERK] has been delivering that exact blend. With these two builds, it proves that customizing a BMW motorcycle is not about chasing trends. It’s about owning identity.
Summary
The BMW R 12 and R 18 Speed Sisters showcase everything that makes custom culture special, creativity, technical skill, and personal expression. With WOIDWERK leading the charge, these bikes stand as rolling tributes to BMW heritage and Bavarian flair. Stylish, powerful, and undeniably unique, they redefine what it means to be a custom cruiser in 2025.
Disclaimer: All specifications, features, and details mentioned reflect project information at time of publication and are subject to change.
Source: BMW
