Iphone Handlebar Mount Harley at Jett Quong blog Motorcycle Bike Handlebar Phone Mount Holder Waterproof Case for Motorcycle Bike Handlebar Phone Mount Holder Waterproof Case for iPhone ROCKBROS Motorcycle Bike Handlebar Phone Mount Holder Waterproof Case. Motorcycle Metal U Bolt Mount & Strong Grip Holder for iPhone 11 Pro Max Cradle Clamping Dimensions: Cradle will hold phones up to 3. 9 inches wide Lipped grip means phone will stay secure in the holder. The redesigned cradle offers even greater support for larger phones in bumpy conditions. Mount; Accommodates rails from 0. 5 to 1. 25 inch in diameter (1. 2cm 3. 1cm) Two u bolts supplied: 1 x 1 inch (2. 5cm) & 1 x 1. 25 inch (3. 1cm) Zinc coated steel (not rust proof)