I can't find a Shimano middle chainring the size I want (36 tooth) but I can find a Sugino, which I've used before. For the last 6 years I've been using a Shimano 34-tooth inner and haven't noticed, which probably says something about me. The Sugino middle advertises that it has no ramps and pins; now that I remember my last one, it was flat.

You're welcome to tell me what difference ramps and pins make and what you think of my bicycling.