Bold claim: gravel racing is where engineering discipline meets rider endurance, and Rosa Klöser embodies that fusion like few others. This piece explores how she treats bike setup as a science, not a checklist, and why her approach—rooted in research, testing, and deliberate tuning—has propelled her to the top of Unbound Gravel in 2024 and to other major gravel wins in 2025.
Gravel serves as cycling’s experimental proving ground, a realm where events and equipment evolve faster than in traditional road racing. Lacking decades of formal etiquette or fixed tyre rules, the discipline remains in flux, continually shaped by terrain, rider preference, and the cross-pollination of road and mountain-bike tech. Each race becomes a live lab, with gains still waiting to be fully understood.
Rosa Klöser stands out as a prime embodiment of this mindset. The German gravel and road racer isn’t content with a simple setup; she treats bike configuration as a principled inquiry into how each choice influences performance. For her, bike setup is a process of understanding the underlying physics and mechanics behind every decision. Every detail is purposeful, and every configuration is tailored to the specific race demands, guided by rigorous research and firsthand testing.
Her precision has yielded tangible results. After clinching Unbound Gravel, she followed up with a sequence of major gravel wins in 2025, including The Rift in Iceland. Yet the real fascination lies in the method behind the outcomes: success in gravel isn’t solely about leg strength, but about who has done the preparatory work to translate insights into meaningful equipment choices.
Before the UCI Gravel World Championships in Maastricht, I spoke with Klöser to unpack her equipment philosophy and to gauge whether UCI gravel courses truly capture the essence of the discipline on the world stage. She weighs in on how course design intersects with performance philosophy and what it means to race with efficiency rather than chasing perfection.
The UCI identity debate across gravel courses has grown louder each year. Fans frequently argue that some races labeled as gravel resemble bike-path routes more than rugged, loose-surface courses. Maastricht offered a case in point: a relatively flat, hard-packed layout with light gravel that many gravel purists wouldn’t recognize as representative of the broader scene. Klöser, who just finished a demanding season that took her from the open plains of Kansas to short, punchy European climbs, says the experience sharpened both her equipment choices and her mental approach. When fatigue sets in, she notes, the goal shifts from flawless perfection to efficient use of remaining energy—extracting the most value from what’s available rather than chasing an unattainable ideal.
In short, Klöser’s method—anchored in data, testing, and a clear-eyed view of race realities—offers a compelling blueprint for riders wanting to translate theory into competitive advantage on gravel. The ongoing debate about what counts as true gravel only highlights how much room there is for interpretation and innovation in this evolving sport.
