Join Date: Apr 2002
Location: Montréal (Québec)
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It depends on what chainrings you have and how you define "good shifting".
Basically, if you have the typical double (53-39 or 48-34 for example), shifting will be quite good without ramped and pinned chainrings, but it will be transparent with ramp and pinned chainrings. On the other hand, if you have cobbled up a really compact wide range double (50-28 on a mountain crankset for example), than the lack of ramps will show.
By "quite good" vs "transparent", I mean that with ramped and pinned chainrings, you will feel confident enough to shift while standing on the pedals, whereas without them, you should ease a bit pressure on the pedals. You'll still be light years ahead of a 1980-style derailleur.