“Prologue provides personalized service in professional brand management and representation. Our clients receive individual attention from our representatives who are accessible at all times. Our team has extensive experience in the areas of cycling, product training, sales, as well as business development, enabling us to provide our clients with time-effective business-oriented solutions.

With knowledge of all types of cycling, Prologue is uniquely positioned to suit the needs of our diverse clientele.  By delivering efficient and thoughtful response, we are critical advisers to our clients, for all needs of the modern bicycle industry.

We are deeply committed to the highest level of professionalism at every stage of every matter. Consistently, we are committed to individualized attention, careful planning, analysis and implementation with the client’s specific needs in mind.”


Ernesto Calderin

Ernesto Calderin is the Founder and Principal of Prologue, LLC. A native to Indianapolis, IN, the home of Zipp Speed Weaponry, Ernesto combines a deep understanding of our clients business needs with the cycling heritage of his hometown.

During his time working behind the corporate doors at Zipp, he managed global product education and was liaison to the international pro teams. This role placed him on the cutting edge of the product development and brand communications.

Aside from working with some of the fastest athletes in the world, Ernesto also reached a high level of cycling in his own pursuits. He is an accomplished mountain bike and road racer who still loves a high paced ride today.

 When the opportunity was presented to transition to managing the northern California region in 2010, Prologue was born. Ernesto is still the driving force behind Prologue and his extensive experience provides reliable counsel to our clients. 


Brian Cahal

Brian Cahal is the newest member of the prologue team and brings a youthful enthusiasm to the group. Born and raised in Martinez California and working at local bike shops since the age of 15, Brian has a strong understanding of product and the local cycling community.  After starting his downhill racing career just five years ago Brian is entering into his second year as a pro and is actively pursuing his professional racing career. Being an active participant in the racing community Brian brings acute knowledge of what riders need from their equipment at the highest level.  While being in the dirt is his natural habitat, Brian has an enthusiasm and a desire for knowledge in all realms of cycling. 



Zachariah Epperson

Zachariah Epperson's story is a bit different from the rest of ours, his cycling career started a lot later in life. Zachariah started swimming at the age of 8 and was nationally ranked top 10 for over 12 years. Going to Olympic Trials in 2008, he shortly stopped competitive swimming shortly after this. Competitive sports is no stranger to him as he entered the world of cycling just 4 years ago when he fell madly in love with road cycling around the Bay Area. Still currently riding for the thrill of exploring new roads paved and unpaved around the US, he brings ample knowledge of road and gravel cycling to the Prologue team.


Robert Mann

Robert has been in the bicycle industry for over 30 years. It was his love of mountain biking which originally sparked his involvement in the industry. He began his early career working at bike shops in Southern California and then later in the Bay Area while he was in college. 

Over the years, Robert has gained a deep understanding of all aspects of the bicycle business by working as an inside and outside sales rep with a number of larger brands in the industry. He understands the technical side of cycling, along with what the retailer’s needs are to help grow their business. It is his love of all forms of cycling, as well as the tremendous relationships he has established over the last 16 years in the Bay Area, that keep him motivated every day to serve his clients.

Robert is a longtime resident of beautiful Santa Cruz, CA. It is the draw of the incredible mountain biking trails as well as the secluded back roads that keep him here.



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