Mission Trails Bike Shop in Santee opened in 2016 at 8047 Mission Gorge Road, Suite D, positioning a full-service bicycle sales, repair, and rental operation within a mile of the Mission Trails Regional Park western trailhead. The repair bench handles derailleur alignment, chain replacement, brake-pad swaps, cable routing, wheel truing, and bottom-bracket overhauls across road, mountain, gravel, and electric-bike platforms—a mechanical precision that mirrors the drivetrain diagnostics performed at The Dyno Shop on Prospect Avenue. Rental inventory includes mountain bikes, road bikes, and electric-assist models sized for riders heading into the Cowles Mountain, Kwaay Paay Peak, and Father Junipero Serra Trail networks that radiate from the park. New-bike sales span hardtail and full-suspension mountain frames, drop-bar road and gravel builds, commuter hybrids, and Class 1/Class 3 e-bikes from major manufacturers. The western Santee location east of West Hills Boulevard puts the shop at the gateway to Mission Trails' 7,220-acre trail system, serving the same Mission Gorge Road corridor that supports specialty automotive work at Import Auto Service at 7945 Mission Gorge Road. Wheel-truing services use a Park Tool TS-2.3 truing stand with 0.25-millimeter dial-indicator precision, correcting lateral and radial runout on rims from 20-inch BMX to 29-inch mountain and 700c road wheelsets.