Originally Posted by
jonathanf2
I swapped out my FSA crankset that came on my bike and replaced it with the GRX 600 10 speed crankset and Shimano Tiagra RS-500 BB. The tolerances are much tighter, but the crank shifts smoother and the chain line is more straight. A lot of people here said a new crank and BB wouldn't make much of a difference...I'm glad I didn't listen! I also cut almost 200g of weight switching out the square tapered BB. Seems like a win/win upgrade for me!
As someone who is about to do just about the same upgrade, I am very happy to hear this. The combination of FSA crank and 105 FD on my Topstone has meant chain rub in the highest gears and i finally managed to get myself a 2x11 GRX 600 crank!