17.5 20.5mm Motorcycle Fork Stem Mount with Waterproof Case fits iPhone 13 PRO MAX (sku 58853) Quadlock Motorcycle Fork Stem Mount Pro Webbs S0ca1d32de6f046dfad0e549620c6a6071.jpg Quad Lock Motorcycle Fork Stem Phone Mount BDLA Motorbikes Quad Lock Motorcycle Fork Stem Mount RevZilla. 17. 5mm 20. 5mm (0. 68" 0. 81") motorcycle fork stem yoke mount & case fits Apple iPhone 13 PRO MAX Waterproof case protects your phone from light rain showers & water splashes. Touch lens allows access to phones screen Charging cable access This central fork stem yoke mount has been developed for use on motorcycles where a handlebar mounting option is not possible or desirable. Designed to fit sports, superbike, endurance and touring motorbikes using the cylindrical bore wall (steering head tube) of the fork stems. Attaches easily to the steering head tube of fork stems. IMPORTANT: First check that your stem cover can be removed leaving a central hole for the mount to fix in. Simply drop the Fork Stem Motorcycle attachment into the hole of the stem and tighten. The split shaft will expand to fit the inside wall of the fork stem Use an Allen Key to tighten to create a tight fit. [isdntekvideo]