Correct me if I'm wrong, but the Crank pulley is the only one that really does anything. The others are for looks right ?

 

kind of. According to UR, they say 80% of the gain is from reduced mass and 20% from underdriving, HOWEVER, the crank pulley gives the most weight reduction. the other 2 are only reducing weight by a few ounces.

 

scc ( it think) had an article that had the exact weight savings of all the pulleys. whichever magazine, it made me realize I dont need the other 2

 

What have the "realaistic" gains been from just the crank pulle and the 3 pulley set ?

 

do a search, I remember someone posting about there was a good hp gain across the board with the Crank pulley

 

Gains of 5-8 across the chart are very typical.