Wasn't asking for advice, but I certainly agree with the "don't do it".

Fred

"Happy Dog" wrote in message
.. .
"Fred Choate" wrote in

How much is too much over gross weight? For example.....the 172 has a
gross weight of 2300 lbs, but what if you are 2345 at time of takeoff.

If you're asking for advice, don't do it. But, 172? 45 lbs? Non-issue.
It's been done so many times by so many people that you don't have to
worry. Lots of 172 drivers here. Ask them what's an uncomfortable
over-gross figure. All of them. Again the advice; don't do it.

moo