Coach Darryl Bike Fit is a San Diego bicycle-fitting studio in San Carlos, operating from a dedicated space on Volclay Drive where coach Darryl MacKenzie has fitted more than 980 cyclists since 2005. The seven-step fitting process runs approximately three and a half hours and covers 19 lower-body and 14 upper-body measurements, adjusting saddle height, fore-aft position, handlebar reach, stem length, and cleat alignment to each rider's anatomy and riding style. Riders who need frame, wheel, or component changes after the fit session work with area shops such as Ye Olde Bicycle Shoppe in College Area, where the fit document translates directly into stem, spacer, and seatpost specifications. MacKenzie earned his USA Cycling coaching credential in 1997 and received the 2010 Coach of the Year Award from the San Diego Cyclo-Vets, building those credentials across 35 completed double centuries and seven California Triple Crowns. The fit studio addresses hand numbness, knee tracking, neck strain, and saddle discomfort — the chronic position-related issues that drive endurance cyclists over 35 to seek a data-driven fit rather than a shop-floor estimate — and maintains a file on each client for future bike changes. The 92119 studio sits near the Cowles Mountain trailhead, within the ride radius of San Carlos cyclists who train on the same roads they commute. The Lake Murray loop and Del Cerro hillside routes are both within a few miles of the fitting space, and cross-training programming overlaps with the strength work at Landform Fitness in College Area, where cyclists supplement saddle time with gym-based interval sessions. Each fit session costs one hundred forty-nine dollars and includes a baseline power test, a detailed position document, and lifetime access to the stored measurement file for future bike purchases.