Originally Posted by
Salamandrine
Along seat tube was more or less standard, but along top tube also was popular. The latter requires some sort of strap or else the pump flies out when you hit a bump.
I have two Silca's of different length for different frame sizes. I do not have a problem with mounting on the TT as the spring is compressed about 1/3 of the total spring displacement limit. It does rattle upon occasion though. One is Campy head and the other is Silca. They both work and are still serviceable.
Now that I think of it, I also have a Zefel but have not used it.