 From 1918 KSS started operating freight trams transporting grain from the silos at Vippetangen to the mills in Grünerløkka and Sandaker.Four passenger cars were rebuilt to carry the cargo, but in 1932 two specially built freight cars were built; the service was very profitable, and the mill company Bjølsen Valsemølle wanted to continue the service after, but road construction forced the tram line to be pulled up after the last service ran on 15 February 1967.Though the old tracks have been razed, plans exist to build a new tramway to serve Vippetangen.