The Tri Clamp is constructed from reinforced nylon and shaped into a tapered jaw that can be mounted onto round or aero seat posts.
It’s been wisely designed to angle backwards so the bottles point away from your saddle, which makes them easier to retrieve and less likely to jump out when you’re going over bumps.
It’s not just for bottles though, as the clamp also has threaded mounts for CO2 cartridges for roadside puncture repairs.
Two Dave-O bottle cages partner the clamp, and these are truly impressive. Despite only weighing 30g each, the cages are very rigid. They’re also slightly narrower than a typical water bottle, so when you push one in it’s tenaciously gripped, even when it’s empty.
The Tri Clamp itself is reassuringly sturdy but being a little over 6cm deep can make fitting it to a small frame tricky.
Overall the Tri Clamp is one of the most robust we’ve seen, with a well thought out shape. Providing it will fit your bike, it’s a great option.
The bottle cages, however, are quite possibly the best we’ve ever tested.