On Thu, 2 May 2019 08:07:44 -0700 (PDT), trader_4 wrote:

I think he kind of did tell you how to know. He implied if you're not feeling
any perceptible vibration, then you don't need it. There is a range of
options when mounting new tires:

no balancing
static
dynamic
RFB

I'm happy with dynamic when I get it done for $15 as part of mounting.
In decades of driving and cars, never had a problem where there was
vibration or anything else bad happening. It works for me. RFB, I've
never had it offered or quoted, it's not that common. I'd see it as
mostly useful if you're having a problem.

I agree with EVERYTHING Trader said above.
o Adults are funny that way

When people say logical things like Trader just did, they're easy to agree
with.

It's only when they make lame excuses for when the logic fails, just as the
logic of why my grandkids can't clean the bathroom always seems to fail.

If they simply admitted they don't like doing the job, it would be logical.