Bottom Bracket Compatibility: Hollowtech II. Grams (crankset + head unit) Location: Shelves-50972. The item "SRM PC7 Shimano Dura Ace FC-7800 Single Side Power Meter Crankset 177.5mm 53/39T" is in sale since Tuesday, November 3, 2020. This item is in the category "Sporting Goods\Cycling\Bicycle Electronics\Power Meters".The seller is "buythemojo" and is located in Boulder, Colorado. This item can be shipped worldwide.