What advantages are there to fitting a performance crank?
Aside from it being stronger than the standard crank there is no other advantage, they may be better balanced than the standard crank, I’m not sure. The only other time you would replace the crank is if the big end bearing gives way or the crank/con-rod breaks. Splitting the crank is a specialist job and requires specialist hydraulic tools to do as it is essential that the crank goes back together perfectly as if it doesn’t the balance will be upset and it will vibrate like made and eventually just snap. As it’s a specialist job it often costs just as much to buy a big end bearing and have it fitted than it would to buy a whole new crank so most people just fit a new crank.
