Wheels is a bus service that provides public transportation in the Tri-Valley Region (southeast Alameda County) of the San Francisco Bay Area, in the United States. Started in 1986, Wheels offers service to various communities in three cities, and connects to Bay Area Rapid Transit (BART) and Altamont Corridor Express (ACE) trains for connections to and from the greater Bay Area (Oakland, San Francisco, San Jose) and Central Valley (Stockton, Modesto, Tracy). In 2021, the system had a ridership of 635,600, or about 3,100 per weekday as of the second quarter of 2022.