Jet Bicycle Wheels in Grantville is a single-operator wheel-building studio run by Charles Wells out of Suite 27 at 4401 Twain Avenue in San Diego's 92120 ZIP. Wells built his first wheel in 1984 and spent a decade as the in-house wheelsmith at Holland Cycles, one of San Diego's longest-running custom frame shops, before launching Jet Bicycle Wheels to focus exclusively on handcrafted hoops. The product line covers three disciplines: rim-brake road wheelsets, disc-brake road and gravel wheelsets, and mountain-bike wheelsets, each assembled from components Wells selects by hand. Builds regularly feature DT Swiss 240 hubs, DT Swiss Aerolite bladed spokes, and HED Belgium Plus alloy rims, though every specification is customizable to the rider's weight, terrain, and riding style. The fitness community at Grotto Climbing & Yoga shares the Grantville commercial corridor along Twain Avenue, and cyclists training in the area often route through the Mission Gorge Road segment that funnels toward Mission Trails Regional Park. Wells measures spoke tension with a calibrated tensiometer at multiple stages of the build, stress-relieves every spoke before final truing, and offers tied-and-soldered spoke crossings for riders who want additional lateral stiffness and paint protection. Repair services include wheel truing, hub overhauls, and full rebuilds on existing rims, covering everything from vintage steel hoops to modern carbon clinchers. Wells has demonstrated his build process at the North American Handmade Bicycle Show, where his booth tagline—"The World's Slowest Wheel Builder"—underscored the deliberate, incremental tension balancing that defines Jet's assembly method. Post-ride refueling options in Grantville include the craft tap list at San Diego Brewing Company on Mission Gorge Road, less than a mile north. Each completed wheelset ships with a build card documenting hub model, spoke count, lacing pattern, nipple material, and final tension readings across all spokes.