The British rapper that dropped $37,500 on the first pair of those "Back to the Future" shoes says, he NEVER, EVER plans to put 'em on his feet!

22-year-old Tinie Tempah was leaving an MLB event in NY last night when he said his prized Nike Air Mags are en route to Michael J. Fox — who's gonna sign 'em!!!

Tempeh outbid EVERYONE for the kicks at a charity auction last week — with every single cent going towards the Michael J. Fox Foundation for Parkinson's Research.