We've sourced these custom carbon fibre mounts from around the world. Made from 3K carbon weave, these mounts are both lightweight and durable. Available in a range of different shapes and sizes to suit various different stems.

Mount your Garmin or Wahoo device in front of your Cannondale Hollowgram KNOT / SAVE 17° integrated stem.
Also underneath is a GoPro lug to attach a wide variety of cameras and lights. 

Specifications
Attach to bottom of the stem 
Fits regular size GPS computers 
GoPro lug underneath for extra versatility
Includes bolts 

Mfr Claimed Weight
48g

Note: Computer and stem are not included.