Originally Posted by
JohnDThompson
Modern cogs are thinner than vintage cogs, to accommodate the profusion of cogs customers have come to expect. With less material to carry the load, they wear faster.
John, if the cog material is identical in the two cases, your logic is perfect. But, free wheels today seem amazingly light to me in some cases. Lighter gears as well as narrower load-bearing surfaces?
I guess the designs are also significantly different.