OK, newcomer here, hopefully I am in right place with my question.

I have Cannondale SuperSix EVO 2014 frame with BB30 bottom bracket shell. I removed original bearings as I wanna replace them and was thinking that inside I will find snap rings (or o-rings) or whatever that is keeping bearing not to go deeper inside of the frame. BUT to my wonder I can see that inside is something that is stopping bearings to go any further, BUT it looks like build-in barriere. I used torch and tools to try to see but there is not sign of that it is snap-ring or that it is removable.

So my question is. Are there BB30 frames that do not use snap rings but have build-in barriere inside? If not then what is it in my frame and how do I remove it? Lastly, before you ask - I am converting that BB30 to be used with shimano crank (24mm) so instead of bb30 bearings I will instal Rotorīs BB30 conversion BB. For that I believe I should have snap-rings out, but can not locate any.

Thanks in advance for help or suggestions.