In tube length vs. bpel

[Jwebater Junior Member Find all posts View Profile Close Jwebater]

So I just bought a cheap air pump. Although it’s a piece of crap the ruler sticker seems to be accurate. I am very frustrated to say the least and have been wallowing in depression today, thinking about how what I’m about to say is possible and why it’s happening. My bpel is 8 in. Yet in the pump I can Barely get to 7 inches. Have any of you experienced this? Why is this happening? Thank you for your help

[Walter BP Rep Senior Member Find all posts View Profile Close Walter BP Rep]

If there's a pad on the tube or if it's not accurate or if you're not getting fully hard then you're not going to match your BP length.

[not2big Senior Super ModeratorPEGym Hero Find all posts View Profile Close not2big]

Pumping expands girth which can reduce length expansion.

[Walter BP Rep Senior Member Find all posts View Profile Close Walter BP Rep]

Pumping expands girth which can reduce length expansion.

How? The penis expands in 3 dimensions when it's being pumped. The ligs are pulled too which gives length.

[not2big Senior Super ModeratorPEGym Hero Find all posts View Profile Close not2big]

Though other factors are involved in pumping your dick, the basic calculation of the volume of a cylinder is based on a factor of diameter times length. If you increase one, you need to decrease the other in order to maintain the same volume. However, when pumping your dick, you are increasing the total volume, but the relationship between length and diameter continues proportionally. Accordingly, if you increase diameter (girth) at a greater rate, length increases at at a lower rate.

[Tom1337 Junior Member Find all posts View Profile Close Tom1337]

I think it also depends on the width/diameter of the entrance hole. A wide hole will usually make your unit wider than a small hole. Sometimes your balls can get sucked into the tube and therefore you can not get to a max pump.
Plus, when you measure BPEL you really push the ruler into your skin. Given the fact that the tube is quite wide, it presses just around your pubic bone. I mean, check where the end of the tube sits. It won‘t be pushing down on your unit like a ruler does.

[PEispossible Senior Member Member of the Month Dec 2019 Find all posts View Profile Close PEispossible]

I lost length when I pumped.

[Jwebater Junior Member Find all posts View Profile Close Jwebater]

That is just awful. I wouldn’t be able to live with myself. How are you getting through that? I am in a mental torment everyday about my penis..

[Walter BP Rep Senior Member Find all posts View Profile Close Walter BP Rep]

Though other factors are involved in pumping your dick, the basic calculation of the volume of a cylinder is based on a factor of diameter times length. If you increase one, you need to decrease the other in order to maintain the same volume. However, when pumping your dick, you are increasing the total volume, but the relationship between length and diameter continues proportionally. Accordingly, if you increase diameter (girth) at a greater rate, length increases at at a lower rate.

If the penis is stressed evenly in the pump then there should be growth in girth and length. I know it doesn't always go this way but in a perfect world..