The opening of a commuter/touring bike shop and cafe next to the downtown train station has stalled. Brothers Tim and Mike Fallis originally had expected to open Depot Bikes & Cafe at the Railway Express Agency Building, 431 I St., Suite 102, in mid-May. They planned to sell, rent and service bikes and offer ready-to-go food and beverages. The opening was pushed back to July or August when they took over the lease for the space next door, after 5th and H Café closed Memorial Day Weekend. No work appears to have been done on either retail space since then, and temporary signs announcing the coming of Depot Bikes have been taken down. Tim Fallis could not be reached for comment.   Pho