# May be coming around to flat bearings

**URL:** https://forums.yoyoexpert.com/t/may-be-coming-around-to-flat-bearings/293988
**Category:** General Yo-Yo
**Created:** [October 18, 2018, 4:53am UTC](https://forums.yoyoexpert.com/t/may-be-coming-around-to-flat-bearings/293988 "2018-10-18T04:53:36Z")
**Posts on this page:** 1
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### Author: ![codinghorror](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/codinghorror/32/8052_2.png) [@codinghorror](https://forums.yoyoexpert.com/u/codinghorror)
#### Post date: [October 18, 2018, 4:57am UTC](https://forums.yoyoexpert.com/t/may-be-coming-around-to-flat-bearings/293988/2 "2018-10-18T04:57:40Z")

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Could be that only the pure concave is a bad fit in this case though, there’s also the “flat in the middle, but curved edges” type which is really more common and a bit more of a hybrid. I had to look up the name, CT or “center trac”.

> [@History of / differences between different concave bearings?](https://forums.yoyoexpert.com/t/history-of-differences-between-different-concave-bearings/290973):
>
> [image] OK so there are a variety of concave bearing shapes: obviously, pure smooth concave, the “O” of bearing shapes if you will concave but with a center channel indent for the string angled down to the middle, the “V” of bearing shapes if you will the most common type: flat in the center, but the sides angle up, the “H” of bearing shapes if you will. I’d say 80% of the “concave” bearings I encounter are this type the least common type, a combination of V and H, angled steps i…

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