Waterproof Motorcycle Bike Handlebar Phone Mount Holder Case for iPhone Waterproof Motorcycle Phone Mount Holder Handlebar iPhone Holder Motorcycle Bike Handlebar Phone Mount Holder Waterproof Case for iPhone Amazon.com: PellKing Motorcycle Bike Handlebar Clamp Mount and 61 Waterproof Motorcycle Bike Handlebar Phone Mount Holder Case for iPhone. Motorcycle Handlebar Mount & Strong Grip Holder for iPhone XS 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; Suitable for most Handlebars. Fits handles bar struts 16mm 33mm in diameter 360 degree tilt & swivel pedestal mounting has ball joint adjustment & easy to use tightening ring to secure position. PRO fit Twin screw fixing.