# help on bearing sizes **URL:** \ **Category:** Yo-Yo Mods and Maintenance\ **Created:** [November 20, 2013, 12:50am UTC](https://forums.yoyoexpert.com/t/help-on-bearing-sizes/61361 "2013-11-20T00:50:50Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![SaltySalvador](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/saltysalvador/32/1187_2.png) [@SaltySalvador](https://forums.yoyoexpert.com/u/SaltySalvador)\ **Post date:** [November 20, 2013, 12:50am UTC](https://forums.yoyoexpert.com/t/help-on-bearing-sizes/61361/1 "2013-11-20T00:50:50Z")
Hello. We all know that the 2 most common bearing sizes we use are c and d sized bearings correct? I happen to have a yoyo that is missing a bearing but requires one that is smaller than a d sized bearing. Any clue what size I might need? ---
**Author:** ![TTTYo](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/tttyo/32/1280_2.png) [@TTTYo](https://forums.yoyoexpert.com/u/TTTYo)\ **Post date:** [November 20, 2013, 12:52am UTC](https://forums.yoyoexpert.com/t/help-on-bearing-sizes/61361/2 "2013-11-20T00:52:20Z")
A sized. Used in older model Duncan’s. ---
**Author:** ![SaltySalvador](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/saltysalvador/32/1187_2.png) [@SaltySalvador](https://forums.yoyoexpert.com/u/SaltySalvador)\ **Post date:** [November 20, 2013, 1:15am UTC](https://forums.yoyoexpert.com/t/help-on-bearing-sizes/61361/3 "2013-11-20T01:15:42Z")
Perfect, much thanks. ---
**Author:** ![TTTYo](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/tttyo/32/1280_2.png) [@TTTYo](https://forums.yoyoexpert.com/u/TTTYo)\ **Post date:** [November 20, 2013, 1:42am UTC](https://forums.yoyoexpert.com/t/help-on-bearing-sizes/61361/4 "2013-11-20T01:42:28Z")
No prablamo