Depends really – Planet-x do
Depends really – Planet-x do just the clamps, but depends whether your extensions will fit or not. They also do full sets with extensions for not that much.
I’ve got a set of short Vision ones (which is FSA’s more racing line) which I find good, but for racing I think I’ll go full carbon for the weight saving.
Have been pretty impressed with the advantage you get against the wind from just holding a more aero position – I reckon probably about 0.5mph as standard thus far, which should boost my times a little bit.