The USWE Airborne-9 Hydration Pack is the mid range option from USWE that is probably one of the more popular sizing options for a versatile hydration pack

four with optional HoldUp +2

Print the last photo (pdf) 1-1 format and you can cut out the different B-RAD mounting bases to see what fits on your bike

040 710845655838 Elixir 1/Elixir 3 11

Measure and realign bent hangers with Park's DAG-2

Wolf Tooth Ultralight Top Cap - Purple - 1 1-8 Inch eBay The USWE Airborne-9 Hydration PackAn ultralight stem cap, machined from lowest weight 7075 aluminium. Total weight (cap and bolt) is just 8g, and it can be fitted flush with your stem or used with a spacer underneath. To install, tighten cap bolt just enough to remove play from bearings.