Originally Posted by
garen
There are 2 types of Twin Turbo shoes. The older type uses 3 springs, the newer type only uses 2. The newer type has 4 equal thickness shoes, while the older type has 2 thicker and 2 thinner shoes.
Ahhhh. I did not know this. Is there a way to tell by part numbers? Does Fioroni even still produce the regular "Turbo" and "Turbo Twin ver. 1" shoes?