# Offstring physics

**URL:** <https://forums.yoyoexpert.com/t/offstring-physics/383306>\
**Category:** General Yo-Yo\
**Created:** [August 26, 2023, 11:45pm UTC](https://forums.yoyoexpert.com/t/offstring-physics/383306 "2023-08-26T23:45:45Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![eap314](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/eap314/32/640207_2.png) [@eap314](https://forums.yoyoexpert.com/u/eap314)\
**Post date:** [August 26, 2023, 11:45pm UTC](https://forums.yoyoexpert.com/t/offstring-physics/383306/1 "2023-08-26T23:45:45Z")

</div>

How do offstring yoyos bounce? What gives the outer rim elasticity? Does the inner rim help, or is it just there for stability?

---

<div class="post-metadata">

**Author:** ![GTDropKnot](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/gtdropknot/32/212400_2.png) [@GTDropKnot](https://forums.yoyoexpert.com/u/GTDropKnot)\
**Post date:** [August 27, 2023, 1:13pm UTC](https://forums.yoyoexpert.com/t/offstring-physics/383306/2 "2023-08-27T13:13:36Z")

</div>

I don’t know much about offstring design but I heard that the harder plastics commonly seen now are more likely to bounce than the rubber rims that used to be common. I guess it used to be a lot more common to see rubber as a material for offstring yo-yos but the rubber had a tendency to roll away more because it can create traction so it can grip and roll out like a tire.

---

<div class="post-metadata">

**Author:** ![Jeaves](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/jeaves/32/203410_2.png) [@Jeaves](https://forums.yoyoexpert.com/u/Jeaves)\
**Post date:** [August 27, 2023, 1:16pm UTC](https://forums.yoyoexpert.com/t/offstring-physics/383306/3 "2023-08-27T13:16:37Z")

</div>

elasticity of the material  
& not being too thick to make it rigid