When people talk about custom cruisers, BMW usually isn’t the first name that comes up. That space has long been dominated by American icons like Harley-Davidson and Indian, with their laid-back silhouettes and endless catalogs of bolt-on chrome. But BMW’s R 12 and R 18 are changing that. These boxers are practically begging to be customized straight off the showroom floor.
That’s exactly what German custom outfit WOIDWERK leaned into at BMW Motorrad Days 2025 in Garmisch-Partenkirchen. The Bavarian custom shop, led by Ralf Eggl, unveiled “The Speed Sisters,” a one-off R 12 and R 18 pairing that shows just how far you can push these bikes while still celebrating what makes them uniquely BMW.
Each bike has its own personality, but both speak the same design language.
The R 12 is the sportier sibling as it’s lighter, sharper, and more compact. WOIDWERK raised the chassis by 15mm, chopped the tail in classic bobber style, and gave it a more aggressive riding posture. A handmade Alcantara seat, a custom 3D-printed tank cover, and black ceramic-coated exhaust from Hattech complete the look. It’s clean, punchy, and full of attitude.
The R 18, on the other hand, wears its power proudly. The tank was raised and narrowed by 30mm, giving the bike a more athletic stance. A floating solo seat and custom rear hoop reshape its silhouette, while a 20mm lift and upgraded 320mm front discs with radial calipers add real-world bite. Most of the visible components were CNC-milled or 3D-printed in-house, giving the whole build a cohesive, hand-crafted feel.
Gallery: BMW Speed Sisters by WOIDWERK
Both bikes share a playful paint scheme consisting of a 3/4 white, 1/4 green motif, a nod to the long, snowy winters of their Bavarian homeland. It’s a detail that ties everything together, a subtle reminder that bikes can be both art and artifact.
You don’t have to go full custom to appreciate what this means. Whether it’s a seat swap, bar change, or some custom paintwork, the R 12 and R 18 are built for personalization. And in a segment often boxed in (pun intended) by tradition, BMW’s approach feels refreshingly open-ended, maybe even inclusive.
Source: BMW Motorrad
