







Rocker Parts GmbH develops innovative and high-quality bicycle accessories that solve a specific problem: bicycles are often too bulky in everyday life – for storage, transport or in motorhomes.
Our aim is to use technology in a way that makes everyday life easier. Functionality, safety, and practicality are always our top priorities – not flashy features or short-lived trends.
Development based on experience
Rocker Parts stands for well-engineered designs and clean mechanical solutions. The development of our products is based on many years of experience in the design of safety-relevant vehicle components. This technical foundation continues to shape our work today.
Rocker Parts GmbH was founded in 2022 by Martin Tischer. His experience from over 20 years of design work in the motorcycle sector – especially in the development of precisely CNC-manufactured components such as brake components, chassis components, triple clamps and footrest systems – forms the basis of many of our solutions.

From problem to solution: RocStem
With this in mind, our RocStem stems were developed. They can be swivelled 90° without tools, thus significantly reducing the required bicycle width.
The crucial difference, however, lies in the details: Our patented FlatFit™ system It automatically compensates for the steering angle, so the handlebar height remains almost constant when swiveling. This makes the bicycle even more compact overall and easier to store or transport – without any additional steps.
Quality and safety as a foundation
Safety is not an add-on for Rocker Parts, but a prerequisite. We use high-quality aluminum and steel alloys and rely on precise CNC manufacturing. Every design is consistently engineered for durability, longevity, and reliable function.
Only when a product meets our own high standards does it go into mass production.
The beginning of a product world
The RocStem stems are just the beginning. Rocker Parts will consistently expand its product range in the coming years – with further well-designed accessory solutions for bicycles, where function, quality and durability are paramount.
Selected references from past projects:
