How to put ColoRamp in Bump node?

Very true - if you have a 0-1 ramp, consider doing cos(pi*input) to get a constant change in gradient as it will look way better. Although in this case, doesn’t the wave in sine mode already produce constant change? I didn’t try, but it kinda sounds like it should.

Also, try using displacement - the distance you end up putting in displacement you should also use for bump.
Displaced:


Bump:

Generator is a cos(pi * sawtooth generator) -> 0.001 displace/bump height. Dimension of object is about 0.4m.