Originally Posted by
rpenmanparker
My experience is that carbon doesn't help much for getting to lightest weight in a stem (comparing to everything available),.
When I bought my Zero7, no one in the U.S. had the FSA carbon fiber stem with the Zero Z graphics, so I put an aluminum Zipp service course SL stem on.
Finally ran down the Zero7 CF stem from a shop in Switzerland, (at an outrageous price).
The Aluminum zipp stem weighs 125 grams; the FSA Zero 7 CF stem 165 grams.