Amazon.com: YIMOPART Motorcycle Phone Mount Fork Stem Cell Phone Holder Kewig Motorcycle Fork Stem Phone Mount, Motorcycle Phone Mount, 1S One 15 17mm Motorcycle Fork Stem Yoke Mount with Holder for iPhone 6S (sku 35931) 15mm 17mm Sports Motorcycle Fork Stem Yoke 6" GPS SatNav Mount Holder Kewig Motorcycle Fork Stem Phone Mount, Motorcycle Phone Mount, 1S One. 15 17mm (0. 59'' 0. 68'') Motorcycle Fork Stem Yoke Mount with Holder for Apple iPhone 6 6S 4. 7 inch screen phones The 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. Made from Aluminium, it is light and attaches easily to the steering head tube of fork stem. Not compatible with dampening systems. Check that your stem cover can be removed leaving a central hole for the mount to fix in. simply drop 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. The double socket arm fastens onto the stem mount, allowing the arm to swivel and pivot as desired. The compact arm is 1 3 4" (45mm) between centres and is made of aluminium. A modern four leg design where the phone is gripped by padded, stainless steel arms, making it light weight and easy to use. This attaches into the arm allowing for fluid movement. The X Grip also comes with an elastic tether goes over the mount and holds the phone in place for extra security. The tether would be necessary while riding due to the high levels of vibration. What do you get? 1x Stem Mount 1x Arm 1x Holder 1x Tether