I haven't seen 24" Tuffs with coaster brake hubs since the '80s. Like Outskirt said, if they're the old-style ones with the metal hubs held in with the rivets, then you might be able to drill out the rivets and replace the hub with a coaster brake unit from an old 20" mag.outskirtscustoms said:Only way I can think of would be if it is a flange type set drill the rivets out and replace it with the hub and flanges for a coaster brake setup from the same style wheels, If not throw up an add that you're willing to trade them for a coaster brake set.