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Originally Posted by
nomadmax
Bunkie
I'm not an engineer but I have stayed in a Holiday Inn
I would say the chief reason larger pulleys are touted as "better" is that they reduce the angle/bend of the chain when it goes around the pulleys, thereby reducing friction. I'm sure they have some kind of fancy bearing in them that further reduces friction but I don't know that to be a fact. As far as increasing chain wrap, it would be the same as it was with smaller pulleys; only a greater distance between the pulleys (center to center) would do that.
Correct me if I'm wrong but with a larger pulley the distance the chain has to pass around each pulley is longer. So it seems it should increase chain wrap by a link or two for sure.
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