Marlborough has debuted its newest mode of public transportation. No, there still isn’t a commuter rail stop, but a partnership with Cambridge-based Zagster Inc. is bringing a two-year bike-sharing pilot program to the city’s streets. The system went live Aug. 28 with 30 bikes at five locations, according to a statement from the Marlborough Economic Development Corporation. A sixth station will open up in September, and businesses have the option of adding their own. So far, you can find bikes at Marlborough Hills, RK Centers, Assabet River Rail Trail, the Walker Building, and Embassy Suites Hotel. Compared with the $99 Boston-area Hubway users pay for annual membership, Marlborough Zagway is only $25 a year. Bike trips under three hours are free for members. Nonmembers, meanwhile, can take the bikes for a spin at $2 an hour. Monthlong or three-day rates are also available with the new system. To sign up or for more information, go to bike.zagster.com/Marlborough.Lucas Phillips can be reached at email@example.com.