I have road bike Cannondale R300. Year is made i not know i try found out. Is has aluminum frame aluminum fork. Brakes is blaze. derailleur is exage 500ex. Shifters is downtube shimano. I want put brifters in my bike. Seat is marin. Crank i have 53/39 shimano sg. I have also other crank 52/42 i swap with 40 ring just to try how is ride, I want found crank 52/36 and 50/34. What is your opinion what thinks i have to replace for i make my bike faster and lighter. Also i forget wheels is 9 speeds i have now cassete 13-28. Wheels is aluminum fulcrum racing 7
