RAM Mount Fork Stem Base Install with X-Grip 

You can buy it on Amazon here: amzn.to/2pn5jyF
The RAM-B-176-A-UN7U consists of a fork stem base, short double socket arm and universal X-Grip holder. The included X-Grip has a clean and clever four leg design that sports great holding power without hiding your phone behind foam pads and plastic. The spring loaded X-Grip holder expands and contracts, allowing for a perfect custom fit of your cell phone.
The X-Grip includes a device tether recommended for outdoor applications. The cradle is compatible with handheld devices that will fit the dimensions listed below. It is important to verify the dimensions of your handheld device with a case/sleeve/skin when determining the overall size.
X-Grip Dimensions:
Minimum Width = 1.875" (Minimum Height = 4.25")
Maximum Width = 3.25" (Minimum Height = 2.25")
Depth = 0.875"
The fork stem base is one of the cleanest ways to mount small electronics on your motorcycle. Simply slide the assembly into the hole of the stem and tighten the machine screw to create a tight fit. This part is designed to fit into the cylindrical bore wall of fork stems and will work with stems that measure from 12 -20mm and 28mm or 0.5” - 1.10” at the following intervals:
Metric Standard
12mm 0.50”
14mm 0.55”
16mm 0.63”
18mm 0.71”
20mm 0.79”
28mm 1.10”
Material:
Powder coated marine grade aluminum, marine grade stainless steel components and high strength composite
Ball Size:
1" rubber ball "B" size