SRD — Sour Racing Development
SRD, short for Sour Racing Development, is our internal development framework. It brings together all frames that are part of our permanent lineup, yet are built strictly to order. These frames are always available, but never batch produced or kept in stock. Each SRD frame is fabricated individually, resulting in longer lead times by design — a direct reflection of the depth, flexibility and intent behind every build.
SRD is where we focus everything that is far ahead in our own technical and conceptual development. These are mature designs that continue to evolve through riding, testing and constant refinement, rather than being frozen at the point of market release.
Development Through Riding, Not Assumptions
We’re proud of our powder coating. It’s All SRD projects are shaped by real-world feedback from our team riders, as well as our own riding. Load cases, fatigue behavior and ride feel are evaluated through racing, long-distance use and hard trail time — not just simulations or desk theory.
Geometry numbers, tube diameters, wall thicknesses and junction layouts are continuously adjusted based on how the frame behaves under stress, torque and long-term use. We don’t separate development from riding — SRD exists exactly because both are inseparable.
Tubing Strategy & Frame Construction
SRD frames are built using carefully selected materials, chosen individually for each frame and application. Tube sets are not fixed or generic — down tubes, top tubes, seat tubes and stays are combined based on the intended use case, frame size and rider input.
- Butted tubing is used where controlled compliance and weight reduction are beneficial
- Thicker-wall sections reinforce high-stress zones
- Diameter transitions and tube shaping help manage stiffness and load paths
Welding sequences, heat input and alignment are treated as integral parts of the design. No SRD frame is truly identical to the next — variability is intentional, controlled and used as a development tool rather than avoided.
SRD gives us the freedom to refine not only the frame itself, but the complete system around it.
The Permanent SRD Lineup
While SRD is a development space, three models are permanently available under the SRD umbrella:
- Bad Granny
- Cowboy Cookie
- Double Choc
All three share the same philosophy: serious engineering, individual builds, and a willingness to question conventions — even if that sometimes comes with a smile.
The Bad Granny, often mentioned with a wink as a klunker, is very much part of that. Conceptually simple, but structurally demanding, it pushes our understanding of tubing behavior, fork interaction and load management at low speeds and high torque. Playful in appearance, but engineered with full intent. 😉
Cowboy Cookie and Double Choc follow the same SRD logic — each exploring different use cases, stress profiles and ride characteristics, yet all benefiting from the same depth of development, feedback-driven refinement and build-to-order approach.
What SRD Represents
SRD is not a marketing term. It’s a working environment:
- A space for technical progress
- A framework for slow, deliberate development
- A commitment to building frames that justify their existence through use
Every SRD frame reflects where we currently stand as builders and riders — and pushes directly toward where we want to go next.
