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The Bontrager Carbon Compact Cranks is a great way to get more usable gears out of your western PA machine. Using a 36t small ring rather than a 39t small ring, it has much lower gearing for the hills. And using a 50t big ring rather than a 53 it has just slightly easier top end gears, helping you spend more time in the big ring. However, using a 11-25 or 11-27 10spd cassette in the rear you get almost the same top-end gear with the 11tcog, ( well, I never noticed ), and a much easier low gear for the really steep stuff. It is a great alternative to a triple ring crankset. Much lighter and much smoother shifting.