Originally Posted by
jemond
I have an old FIORI byke
I would like to replace the ball in the bearing with ceramic ball
.....
will it make a big difference?
Hugely unlikely.
Unless your current bearings are in really, really poor condition.
In which case it's the rework as such - not the switch to ceramic - that brings the improvement.
Ceramic bearings CAN lower rolling friction with a few percent.
But rolling friction - from a good bearing - already is only a few percent of the overall resistance.
So you're looking at an improvement of a few percent of a few percent.
You do the math.
A hint: it isn't much.
Originally Posted by
jemond
Compare to my other byke it is more difficult to run
The bearings are only a tiny part of the whole. You should look elsewhere. Tires, tire pressure, gearing ratio, ride position etc