| You'd never spot a crank that has been balanced tbh. It's nothing more than "perfecting" the spec'. Blueprinting if you like. No different to taking a pot of pistons and picking 2 that are the same weight, if you like.
Lightening is a different ball game and not cheap. If you were going to the expense of lightening a crank, you'd move some metal which would be obvious. A balance could be no more than taking another mm out of the holes that the factory drill in the first place.
There's very little, if any, performance advantage to be had. Reliabilty is main/only benefit. You'd get more by shimming the crank a little on the light side to get less drag on the mains..... |