Seamus Bike Shop has specialized in vintage bicycle restoration and custom wheel builds from its 16th Street workshop in downtown San Diego's East Village since 2008. The inventory mixes new Rivendell, Soma, and Surly touring frames with used and vintage road bikes sourced from estate sales and trade-ins, a reclaimed-goods model that echoes the salvage ethos at Architectural Salvage San Diego nearby in the same district. Custom wheel builds use hand-laced spoke patterns tensioned on a truing stand, producing touring-grade and track-grade wheelsets matched to rider weight and terrain profile. Same-day repair service covers flat fixes, chain replacement, brake adjustment, headset repacking, and threaded-fork installation on steel-frame bikes from the 1970s through the 1990s. The shop's fixie and track bike builds serve the East Village cycling commuter community that overlaps with the fitness clientele training at Downtown Jiu Jitsu and Fitness SD blocks away on 13th Street. Highest-complexity projects involve full-frame cold-set respacing of vintage steel dropouts to accept modern 130-millimeter rear hub spacing, preserving original lug geometry while enabling compatibility with current-generation cassette drivetrains.