u/Five-words-or-less

What i mean is if I have a bear 30° on the back of a supersonic vs a seismic 30° truck and both are just tightened to the point that it doesnt turn then dont they both provide a stable back for which to pump off of ?

I dont see what having a different duro or brand bushing does anything more efficient than the other?

Nor do I see what having a different truck would offer as long as they are both stable.

I ask because on one of my supersonics I have some firm yellow bushings and on the other I have some softer orange bushings..and I notice no difference or added benefit.

Lastly, should I run bear trucks front and back or run bear on the front and seismic trucks on the back for the better pump setup?

Both are 130mm .

Thanks