Originally Posted by
HillRider
Right. I have a Profile Designs H2O stem that looks just like the one in your second photo (same maker?).
I'm pretty sure the "Zoom" stems (purchased through Nashbar) were exactly the same design, probably from the same factory, as the Profile H2O stems.
Although the one on my singlespeed bike (pictured) apparently has a 25.4mm clamp. The faceplate didn't fit flush around a 26mm bar, so I used a 25.4 which fit perfectly. All of the H2O stems I've seen were 26.0mm.