Attention all Bike Mechanics!
In your honest to God opinions, would you say that the worse thing to come out of japan's component giant, Shimano is their "rapid rise" derailleur (AKA Crapid rise, Rapid Demise, etc.) or their "Biopace" chain rings??
Mechanics at our shop have quarreled over this topic for eons, and now we want others to chime in!