SKS: COMPIT STEM - INTEGRATED · MINIMALISTIC · SIMPLE The COMPIT STEM mobile phone holder for mounting stem holds your mobile phone firmly and securely in place, even in tough off-road conditions. The high-quality smartphone holder is mounted below the existing ahead cap on the handlebar stem. Thanks to the bayonet mount, the mobile phone can be mounted quickly and easily with a single twist – in either direction. This means that the cockpit stays clean and the handlebar remains free. The mobile phone holder with its stem mounting also provides an ideal solution for using the COMPIT system for electric mountain bikes with 35 mm handlebar clamps as well.