# What's the difference between the YYF SPEC bearing and Center Trac bearing?

**URL:** <https://forums.yoyoexpert.com/t/whats-the-difference-between-the-yyf-spec-bearing-and-center-trac-bearing/18490>\
**Category:** Yo-Yo Mods and Maintenance\
**Created:** [August 28, 2010, 6:32am UTC](https://forums.yoyoexpert.com/t/whats-the-difference-between-the-yyf-spec-bearing-and-center-trac-bearing/18490 "2010-08-28T06:32:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Starscreem88](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/starscreem88/32/26_2.png) [@Starscreem88](https://forums.yoyoexpert.com/u/Starscreem88)\
**Post date:** [August 28, 2010, 6:32am UTC](https://forums.yoyoexpert.com/t/whats-the-difference-between-the-yyf-spec-bearing-and-center-trac-bearing/18490/1 "2010-08-28T06:32:51Z")

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Hey guys,

I bought myself a Genesis from [yoyonation.com](http://yoyonation.com), and it comes with a center trac bearing and a silicon respond pads and a string inside a mini envelope, and a SPEC bearing in the Genesis. I tried both bearing and they played well, pretty much the same. But I want to ask you what’s the difference between SPEC bearing and Center Trac bearing? I know the Center Trac bearing shape looks different than SPEC.

Happy Throwing! =]

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**Author:** ![Starscreem88](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/starscreem88/32/26_2.png) [@Starscreem88](https://forums.yoyoexpert.com/u/Starscreem88)\
**Post date:** [August 28, 2010, 6:38am UTC](https://forums.yoyoexpert.com/t/whats-the-difference-between-the-yyf-spec-bearing-and-center-trac-bearing/18490/2 "2010-08-28T06:38:00Z")

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Oh I see… Thanks for explaining. 🙂

Happy Throwing! =]

P.S: I’m not a bad thrower…lol