The most problematic is the full carbon fork. You must be careful when
cutting the steerer. Also, a compression insert must be used instead of a
star fangled nut. Also, the steerer cannot extend too far past the top of
the headset. Aluminum is heavier. Chromoly is heavier still.

--
--------------------------
Andre Charlebois
BPE, MCSE4.0, CNA, A+
webmaster for Triathlon New Brunswick
www.TriNB.com
"TedK618265" wrote in message
...
I have a Specialized Allez alluminum frame and am thinking about getting a
carbon fiber fork for it. I have seen forks with cro-moly steering tubes,
alluminum steering tubes, and carbon fiber steering tubes. Are there any
differences as to strengh and durability? Also, if I decided to get a
fork
with a carbon fiber steering tube, does it require a special headset (the
frame
is not built for an integrated headset). Any thoughts appreciated.

Ted