Here is a FasTack application where regular glue won't work. If someone has
an alternative, please let me know. To start with, a little physics and
thermodynamics of rims.
A standard rim with parallel braking flats has a large radiator (the inner
section of the rim with the graphics on it) to get rid of heat. The braking
flats (heat generators) are a long way from the center of the glue. The net
result is you have to use the brakes for a relatively LONG time to soften the
glue.
An aero rim has virtually no radiator to get rid of heat, and the braking
flats are really close to the center of the glue. The net result is, if you
live in mountainous terrain, moderate use of the brakes, while descending,
will melt your glue to the point that you can lift the tire off the rim and
watch the glue pull like taffy.
I started using FasTack after coming part way down Ebbet's Pass and
fortunately stopping because my bike felt a little weird. After an
appropriate cool down period, I continued using the "Merckx" water bottle
technique to keep the rims cool.
What I have noticed using FasTack and other glues, is that the base tape
starts to curl at the edge. I don't recall it being any more frequent with
the FasTack, but I will certainly pay close attention to that from now on. I
had written it off as crappy base tape glue from the tire company, and
usually just reaffix the tape using latex. It seems to work ok but I have a
nagging feeling that there must be something better. I recently heard of
"base tape glue" but haven't seen any. Anyone used it? Have a source?
A trick with Clement glue (the only other glue I'll use) is that if you have
the right base of glue on the rim, and you put on a spare (even one with no
glue), and then ride your brakes for awhile to heat the rim, the glue grabs
the tire. However, you will melt it if you have aero rims and ride in the
mountains.
I think that explains one of the reasons Teams used wider, heavier rims for
stage racing. At least for the road stages. To finish first, you must first
finish.
Stevan Thomas
Alameda, CA