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Bike Fitting

At this time we are no longer scheduling Bike Fitting online. For all your Bike Fitting needs please email Russell at

Improve Your Comfort & Performance

Investing in a professional bike fitting is critical to getting the most out of your cycling experience. Each cyclist, from first time novice to professional racer, will benefit from proper positioning, optimizing comfort, and efficiency. At Gerk’s we specialize in the Body Geometry Fit method, developed by Specialized and the Boulder Center for Sports Medicine. Additionally, we are supported by the DATA dual angle video capture system, a cutting edge software specifically designed for bike fitting. This unique system combines a dynamic fit, along with a thoughtful assessment of each rider’s bio-mechanics, taking into consideration your unique cycling goals and individual needs, so we can create the ideal positioning on your bike.

Bike Fit Specialist

Russell Stevenson

A Seattle native, Russell Stevenson is a life long PNW cyclist. He began racing at the age of 15. He went on to enjoy a professional career in Road, Cyclocross and XC MTB Racing, wining numerous Elite and Masters National titles as well as a 2013 World Championship. His decades of professional racing experience led him to career in industry outside sales, personal coaching, bike fitting and now event promotion. When not at Gerk’s, Russell runs the Wed Night Worlds MTB race series in SeaTac, WA. As a Bike Fit professional, Russell holds numerous accreditation’s including; Bike Fit Systems, Slow Twitch and Specialized BG. His fitting philosophy in simple; Meet the body where it’s at to promote and ensure greater comfort, efficiency and performance.

Bike Fit Options

Retul bike fit option is temporarily unavailable.


Road/MTB/Gravel $350

Aero/TT $400

Gerk’s uses the RETUL fit system to ensure maximum rider benefits. The RETUL system uses motion capture technology allowing our trained fitter to record and analyze the dynamics of your pedal stroke and body position. Our multi-step process includes an evaluation of your physical structure and limitations of flexibility. This ensures that your final fit position falls within your bodies capabilities and maximizes your performance while minimizing your risk of injury.  Expect our RETUL service to be 2-4 hours in length.



The Gerk's Bike Fit follows the same procedures as the RETUL Fit without the Motion Capture features. This process includes a physical assessment and adjustment of all contact points of the bicycle(foot/pedal, saddle and handlebars). A typical Gerk's Fit takes but is not limited to 2-2.5 hours. 


$100 Hourly

Unsure of your exact needs? We recommend booking hourly Studio Time with our Fit Specialist. This may include new bike sizing, cleat and saddle installation and adjustments, custom foot beds or general tweaks to your current set-up. Please contact us prior to booking to assess your project.

$150 Custom Footbeds

Maximum power performance and comfort. Schedule a footbed appointment along with your fitting.


Retül Fit is more than just a bike fit—it’s a way to learn about your body, the root cause of your aches and pains, and how a proper fit will help you achieve your cycling goals. Using 3D motion capture technology, the Retül system accurately measures every degree of movement and millimeter of distance, providing you and the fitter with data to support the choices made during the fit for your cycling equipment and personal riding experience.


Be prepared. Come to your fit appointment with all your usual riding equipment including a clean riding outfit, shoes and helmet. If you tend to sweat a lot please bring a towel as you will be riding at varying levels of intensity. Please arrive with a clean functioning bike. We do not service bicycles during a Bike Fit. If you have any fit related parts(touch points of the bike) you wish to install, please bring them. A Bike Fit is the ideal time to change out an old saddle, worn bar tape or grips, shoes and insoles.