Wrexham FC mean a hell of a lot to football in Wales, especially to people like me who grew up there," said Speed.
"To lose Wrexham out of the top four leagues would be a disaster.
"I stay in touch regularly and I hopefully they'll win Saturday to keep themselves up," Speed added.
"We've only got Cardiff, Swansea and Wrexham (in the Football League), so to lose one of them would be a disaster for them and for Wales in general.
"Wrexham have got a fantastic youth set-up there and for a club in the position they are, the development they've got there is a fantastic organisation."
Former star striker Lee Trundle has his sights set on getting Swansea into the play offs tomorrow but he's sure his old team can survive.
"It's a massive game, but they only need a point and I'm sure they'll do it, Brian Carey will get them out of it," Trundle said.
"They are one of just three Welsh sides in the football league and we need to keep them there, they're not a club you expect to be in such trouble.
"They are so important to north Wales football, if we lose a professional club it limits the chances for young kids coming through."