VACUUM Cylinder Sizes

So just curious about pumping. I have a 1.75” and a 1.50 I’m sitting at 1.57-1.60 depending on where on the shaft.

Is it better to over pack the tube or should I keep running with the 1.75 until I can pack it? I do stretches, jelqs, and pumping. But have been having issues with the donut effect. Only on the right side and I am never over 5hg.. 5min in 3 out with tissue massage 3 times. Then I’m done for the day.

Will it harm/shrink my girth using the 1.50 regularly or will it help with length gains?

Sorry for the noob questions. I searched with very little luck.

Thanks in advance for the info.

I’m still considered a newbie but I read that if you’re pumping for length, then choose a tube with the exact circumference and up to 3” longer. But if you’re pumping for girth, choose a tube that is .1/4” larger in circumference.

My tube is 1” longer and 1/4” larger in circumference.

Cylinder sizing chart

Girth ——-> Cylinder Diameter
3.50 to 4.50* —> 1.50
4.75 to 5.25* —> 1.75
5.50 to 6.00* —> 2.00
6.25 to 6.75* —> 2.25
7.00 to 7.50* —> 2.50
7.75 to 8.25* —> 2.75

Most recommend moving up in size when you start to pack up to 3/4 up the cylinder.

The company that used doesn’t have an exact one but I haven’t searched for any others. From what I’ve seen they are in .25 jumps. And girth I’m in-between the 1.5 and 1.75 I measure at 1.57 girth a 1.67 cylinder seems ideal for now but I am unsure if anyone make such a size.

Dtwarren1942

I am experiencing the donut effect on the right side of my unit when using the 1.75 I got the 1.50 thinking it would help with that issue but it seems that I over pack the tube “girth” and makes my “unit” slimmer which I don’t like.

The sizing chart puts me for the 1.75 but like I said I get the donut effect to one side and it is not a great sight.

When I limit vacuum level to under 5 hg and time under vacuum to under 20 minutes, I never experience a doughnut.

I hate to nitpick but tube sizes go up in ¼” diameter sizes, not circumference.

Gprent

I have had some gains and outstanding erection hardness I started at BP 6.78 and 4.75 girth. Now at 7.xx and 5 girth. But started pumping to try and help the gains. Goal is 8 and 5.5

Any guidance is appreciated.