# Synergy or Hubstacks?

**URL:** <https://forums.yoyoexpert.com/t/synergy-or-hubstacks/13041>\
**Category:** General Yo-Yo\
**Created:** [April 5, 2010, 7:08pm UTC](https://forums.yoyoexpert.com/t/synergy-or-hubstacks/13041 "2010-04-05T19:08:31Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![rojasmf7](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/rojasmf7/32/103813_2.png) [@rojasmf7](https://forums.yoyoexpert.com/u/rojasmf7)\
**Post date:** [April 5, 2010, 7:08pm UTC](https://forums.yoyoexpert.com/t/synergy-or-hubstacks/13041/1 "2010-04-05T19:08:31Z")

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I just ordered a pair of synergy caps for my Dark Magic yoyo. I was just wondering… what’s the dang difference between the caps and the hubstacks? Which is better? Please respond!

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**Author:** ![Yummy](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/yummy/32/14065_2.png) [@Yummy](https://forums.yoyoexpert.com/u/Yummy)\
**Post date:** [April 5, 2010, 7:19pm UTC](https://forums.yoyoexpert.com/t/synergy-or-hubstacks/13041/2 "2010-04-05T19:19:23Z")

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One is a product of YoYoFactory, the other is a product of YoYoJam. Synergy caps use B bearings. Hubstacks use A bearings. Synergy caps fit where the sidecaps normally are. Hubstack posts are either machined into the yo-yo or special nuts are used that have the hubstack posts machined into them (in the case of the PGM and FHZ stack nuts).

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**Author:** ![ccn411](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/ccn411/32/192885_2.png) [@ccn411](https://forums.yoyoexpert.com/u/ccn411)\
**Post date:** [April 5, 2010, 11:33pm UTC](https://forums.yoyoexpert.com/t/synergy-or-hubstacks/13041/3 "2010-04-05T23:33:08Z")

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Synergy Caps fit mostly yoyojam yo-yos and I’ve never seen like a Duncan with with them yet. Yoyofactory Stacks (Hubstacks aren’t the only ones out there) can fit all sorts of yo-yos besides a stock YYJ unless you mod it.

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**Author:** ![anonyo](https://avatars.discourse-cdn.com/v4/letter/a/8baadc/32.png) [@anonyo](https://forums.yoyoexpert.com/u/anonyo)\
**Post date:** [April 5, 2010, 11:42pm UTC](https://forums.yoyoexpert.com/t/synergy-or-hubstacks/13041/4 "2010-04-05T23:42:55Z")

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> [@Yummy](#):
>
> One is a product of YoYoFactory, the other is a product of YoYoJam. Synergy caps use B bearings. Hubstacks use A bearings. Synergy caps fit where the sidecaps normally are. Hubstack posts are either machined into the yo-yo or special nuts are used that have the hubstack posts machined into them (in the case of the PGM and FHZ stack nuts).

I’m holding my renegades bearing up to my synergy cap bearing, they aren’t size b…

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**Author:** ![evnouski](https://avatars.discourse-cdn.com/v4/letter/e/22d042/32.png) [@evnouski](https://forums.yoyoexpert.com/u/evnouski)\
**Post date:** [April 6, 2010, 6:31am UTC](https://forums.yoyoexpert.com/t/synergy-or-hubstacks/13041/5 "2010-04-06T06:31:36Z")

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from what i have played with the hubstacks are way more balanced than the synergy caps also. and not nearly as noisy.

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**Author:** ![ccn411](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/ccn411/32/192885_2.png) [@ccn411](https://forums.yoyoexpert.com/u/ccn411)\
**Post date:** [April 6, 2010, 4:31pm UTC](https://forums.yoyoexpert.com/t/synergy-or-hubstacks/13041/6 "2010-04-06T16:31:48Z")

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> [@evnouski](#):
>
> from what i have played with the hubstacks are way more balanced than the synergy caps also. and not nearly as noisy.

Adding to that:

Synergy Caps are said to have a vibe that’s noticeable. Hubstacks are more stable and have a lot better control.