Designed to be used with IN-Route stem, headset and forks; concealing all housing from the shifters to the frame- Stem can provide 43.5-49mm of stack and does so by increasing the stack height of the stem's steerer clamp and a positive stem angle- Carbon body mated with an aluminum faceplate and titanium hardware- Includes: (3) 10mm, (2) 5mm and (1) 10mm bypass spacer- 175g-197g