Specifications include, but are not limited to:A. General It is the intent of the District to enter into a Contract for the lease and service of bus tires on a tire mileage basis. The District operates three yards, one in Santa Rosa, one in Novato, and the Main Yard and Shop located in San Rafael, California. Currently, a layover parking lot is located at 101 Perry Street in San Francisco, California. The District may operate up to 220 transit and suburban type buses in services between San Francisco and points in and between Marin, Napa, Sonoma, and West Contra Costa Counties, California. All present coaches are 35-, 40-, 45-foot long and 102" wide, 6, or 8 wheel, 4 or 6 cylinders, and airconditioned. Future coaches may be of other types such as double-deck, mini-buses, tractortrailer, etc. Should any of these different types be incorporated in the District’s fleet, the tire rate applicable to such types of buses shall be established by mutual agreement between the District and the Contractor. The District provides two types of transit service: (1) Commuter service from Santa Rosa in Sonoma County to San Francisco, a distance of approximately 65 miles, and service to BART. This is the longest route with the highest speeds. During commute periods, the traffic flows from 65 plus miles per hour on portions of the freeway for up to 10 miles, with an average speed over the entire run of about 31 miles per hour. The District also operates over the same route at other than commute periods in which the speeds on the freeway may be in excess of 65 miles per hour for up to 35 miles, which are usually, but not always, “dead head” runs. (2) Local and feeder service. B. Tires Tires to be provided under this specification and any future tires provided under this Contract shall be subject to District approval for conformity under this specification. To allow complete flexibility in the use of equipment, it is intended to allow the use of Inter-City high speed type tires, as defined in the California Administrative Code, Title 13, Motor Vehicle Section 1085(M) on all buses, provided all tires meet the manufactures’ speed and weight limits of District buses and general transit or commuter operating conditions. To maintain speedometer accuracy, the standard size tire for all buses shall be equal to 315/80Rx22.5