I called Crank Works in Tempe AZ today.. I asked what they do. They will pull apart the old crank, install new Z400 bearing, press crank back together. They check the crank for balance while it's apart. I can't explain it as I am unsure. When it's together they will add weight if needed at 18cents a gram.. As much as 100 grams could be used or as little as zero.. They harmonically and dynamically balance them... You must send the piston on the rod w/ the circlips and rings. Every crank/piston set up will weigh different!!!!!!!!!!!!! The goal is to get them w/in two grams of perfect.. 135 bucks plus the cost of how many grams of material and you supply the Z400 big end rod bearing...

 

have you had work done there before? im sending my crank to them tommorow. I talked to them and they said $180 and additinal $35 for the z400 bearing which they stock. They seemed to be very familiar with the cannondales. well see.