Dixon's, a Park Slope institution since 1966, is an old-fashioned neighborhood bike shop, right down to the penny-farthing bicycle on the sign hanging out front. Its selection includes road bikes, mountain bikes, hybrids and a good number of fixed-gear messenger bikes, along with all the accessories. And runners take note: Dixon's carries Chariot baby joggers. The mechanics can handle everything from a simple adjustment or basic tune-up to a complete overhaul. As is fitting, old-fashioned reliable service from owner Dave Dixon and his team may be accompanied by refreshingly old-fashioned straight talk about your bicycle, its components and their assessment thereof.