‎1.25 inches

Replace 30 Dumbbells; With 15 weight increments per dumbbell, this compact adjustable dumbbell set delivers the same value as 30 individual dumbbells in a fraction of the space Smooth Weight Selection System; Easily choose the weight value you want to train with; Move up in 5-pound or 2.5-pound increments for totally customizable training; Choose between 10 and 55 pounds Fitted Storage Trays Included; Store your adjustable dumbbells in custom-molded storage trays when not in use; Each tray is clearly marked with easy-to-read weight identification; Take up less space