Malarkey 11 Jan 2014, 9:15 pm #673 Malarkey Malarkey Malarkey Posts: 6097 Threads: 69 Joined: Jan 2013 Reputation: 0 RE: Go North East - Latest (11 Jan 2014, 9:08 pm)Dan wrote I could be wrong, but I think the SPDs were designed to have the shell life of a midibus vehicle (12 years)? I'd say that's spot on Dan, Although 8220 for example has lasted for 16 Years.