Yo-Yo designs that aid or hinder rejections?

What’s some features of a yo-yo that makes rejections easier or more difficult?

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Based on my own observations and just like reasoning of how rejections work, there are a few things that impact rejections. RPMs, where the string touches the wall, and how much contact between the string and the yoyo is possible due to shape. High walled yoyos allow for lots of contact between the yoyo and the string without having to pull the string very far and those usually reject well. Zero wall yoyos can work really well also bc when the string does make contact, it is usually towards the outside of the diameter so that area is traveling more distance than the inner area closer to the axle. Larger dia yoyos work well bc of like a similar principle i think. Rounder shapes work pretty well usually bc so much contact is possible. Rpms mattering is pretty self explanatory like if a yoyo is spinning slower it’s not going to have as much force to pop the string off. Wider yoyos can be harder bc you usually have to move the string further away from the center to make wall contact. I think yoyos w response bumps work better usually but i am less sure abt this one. Idk if all my physics terminology is correct but uh yeah idk these things seem true.

Ime you can bully most yoyoing into popping of a rejection without much thought like maybe adjust technique maybe but idk i dont think abt it really and can do my rejection tricks w like all my yoyos.

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