Originally Posted by dgasmd

I've had 2 pairs of some 10 grm carbon cages in my bikes for >3 years now, but since the bottom tab recently broke in 2 of them, I decided to get some other cages to try. I couldn't find any carbon ones under 15 grm in a design I liked that were under $60 each, so I figured I would try these Tacx ones. They are the most commonly used in pro bikes, so they have to be a least very functional.

First of, the name of "Ultralight" is a misnomer as I guess it would depend what you consider ultralight for cages. In my mind, that is >15 grm, but these weighted in at 40 grm each with no screws, which means I just added 60 grm to the bike altogether!!! That brings me to my second point, the screws and holes. The holes in these are such that I went through 4 different types of cage screws I had here ranging from carbon fiber screws to your simple steel screws and the heads in all would not fit their holes. They did not come with screws (do they normally do???). Finally, I had to take a dremmel and bore the holes out. Had to use 2 different screws still to make it work. Also, one of the cages is so deformed that in order to make it align the holes with the bike's cage holes I had to pull it apart considerably. It is plastic and rubber, so that should not be a big deal I guess. I also had to dremmel the inside lip of the cage so their own tacx bottles could fit through it without having to wrestle considerably with it.

Positive so far is that they were very cheap, and now also accommodate many different bottle types and brands. That was something I never liked about my light carbon cages in that it considerably limited me to which bottles I could use. Given the weight weenie I am, I know this is going to bother me to no end until I replace them for something more permanent and in the 10-15 grm range. They'll do in the meantime though.