Amazon.com: [USbuyForLess USA] Smartphone Bike Handlebar Mount with Mua Quad Lock Stem Handlebar Bike Mount Kit with iPhone SE (3rd Gen These are the best iPhone holders for your bicycle and mountain bike Spin bike iphone holder top 360 Silicone Smartphone Handlebar Rack Adjustable Motorcycle Stand. Locking Strap Bicycle Handlebar Mount & Strong Grip Holder for iPhone SE 2 2020 edition 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; Ideal for awkward framework & irregular sized handles or handlebars. Strap is suitable for square, oval & round handlebars, frames, poles or bar. Fits minimum diameter of 21mm & maximum diameter 40mm.