Risse Racing Genesis damper to fit Pro Flex 657, 757, 857 frame. Externally adjustable air pressure via standard schrader valve. The item "Risse Racing Genesis Damper rear shock to fit Pro Flex 657, 757, 857 bike frame" is in sale since Saturday, July 14, 2018. This item is in the category "Sporting Goods\Cycling\Bicycle Components & Parts\Rear Shocks". The seller is "kevster7" and is located in Redmond, Oregon.This item can be shipped worldwide.