About Industry Nine Hydra Hubs

Made in USA, with class-leading engagement and a unique sound.

• 0.52 degree engagement, 690 POE
• Unique high-pitched sound

We score them a 8/10 in loudness, with a unique sound. 

Please note that some customers have had reliability issues with their Hydras. I9 has moved to address this with an updated axle. We recommend Project 321 G3 hubs as a more robust, high-engagement product for a worry-free ownership experience. 

You can read more at the manufacturer’s website: https://industrynine.com/hubs/mountain/hydra-classic-boost-6b-rear/

Weight
Front : 176 grams
Rear : 301 grams