Tailfin is back with another brilliantly over-engineered bicycle accessory, the HydroMount. If the name doesn’t give it away, the HydroMount is Tailfin’s new mounting solution designed to attach water bottles and cargo cages to bike frames without requiring existing bottle bosses. Yes, there are a number of other products already on the market to do the same thing. But Tailfin’s solution addresses nearly all of the issues that could arise from strapping an additional bottle mount to your bike…
Priced at $28 for the two-strap Base version and $35 for the three-strap Full version, HydroMount addresses mounting limitations on small frames, older bicycles, full-suspension designs, and heavily loaded bikepacking setups. The mount supports loads up to 1kg with two straps and 1.5kg with three straps, utilizing standard 64mm two-bolt bottle cage mounting holes for compatibility with most cages and accessories.
The HydroMount employs Tailfin’s V-Mount technology introduced on their strap-mount bags, featuring a TPE (Thermoplastic Elastomer) rubber overmolded body that provides frame protection and a rock-solid hold across various tube profiles. The design incorporates integrated molded threaded inserts for structural durability and includes bolts with bottom-out protection to prevent over-tightening and to prevent the bolt from going into the frame below.
The included straps offer tool-free adjustment and maintain what Tailfin claims is the lowest stack height among similar mounting accessories. Should you not need the additional mount for your whole journey, the small form factor means it can easily be stashed in a tool roll, pocket, bag, etc.
While the two-bolt compatibility may limit you from using some cargo cages, Tailfin shows the mount being used with a three-bolt cargo cage – just without using the top bolt. The 1.5kg weight limit while using three straps is likely a requirement for this set up, but it shows that the mount can accommodate various cargo beyond water bottles, including tools and cooking equipment.
HydroMount includes a five-year warranty against manufacturing defects and a 30% crash replacement discount.
