Originally Posted by TejanoTrackie

Thing is, they are also more than twice the street price of Dura Ace cogs, which are totally excellent and very durable. I pay only $24 for Dura Ace cogs at World Class Cycles, and don't see any reason to pay more for something perhaps marginally better. It's the old case of the point of diminishing returns, where a major increase in cost yields only a marginal improvement in performance.