Is a 5lbs weight advantage a big gap?

It's not a big gap, even at world level.

 

The question should be, does an extra 5 pounds of weight cut make a difference, and apart from HW, yes it makes a difference. At Cruiser it might be moderate, middleweight major, and at 135, you actually should be fighting in a different weight class, which were created for a reason.

By the time fight night comes along boxers can rehydrate a lot and need to do it carefully, because overeating can make you heavy but completely useless - it is the weight cut that is the real difference.

 

The bigger you get the less it mattes. ^^^^ Explains it perfectly.

 

The question is not asked well. Whetether it is a HW or all categories? In smaller categories it is already P4P king, if he is successful.
Naoya Inoue is example.
Flyweight + 3lbs = Superflyweight + 3lbs = Bantamweight

 

Depends on the weight class. For bantams its huge, for heavies its nothing.

 

depends on what weight class

 

I say 154 and above is not that big of a factor. Anything under is noticeable. You can physically the difference between a LWW and WW or a SFW and a LW.

 

The lower you go in weight the more it matters as proportionately 5lb is a lot bigger.

 

I think above Middle it's not a big deal. The framing of the question could be better as we know some fighters can roll into the ring being 10-20 lbs heavier. So 5lbs is only a half or quarter measure to what can and does happen. 5lbs at the lightest will make quite a difference though.

 

Fly to Bantam is 3 divisions in a 6 lb span

 

Malignaggi dropped 5lbs of hair extensions against Ndou and it helped immensely.

 

At the lower weightclasses it is.

If one light Flyweight enters the ring at 112 and the other at 117, you basically have a Flyweight fighting a Bantam on fight night.

 

I say its stops mattering after 140. 147 is a big jump and you start getting naturally much larger men who weight cut to it from 165+.

140 and down is mostly smaller guys.

 

5lbs isn't a whole lot - even in the minimum weights it's <5% total weight.

But down there it does seem to make a pretty big difference, I assume that's why the gaps between divisions down there are so small.

Even looking at 130 | 135 | 140 that's 2 divisional gaps that is that 5lbs

I'd guess that once u get to welter and above 5lbs becomes less and less of a difference