# What is a side effect ?
**URL:** https://forums.yoyoexpert.com/t/what-is-a-side-effect/50593
**Category:** Yo-Yo Mods and Maintenance
**Created:** [March 10, 2013, 3:13am UTC](https://forums.yoyoexpert.com/t/what-is-a-side-effect/50593 "2013-03-10T03:13:11Z")
**Posts on this page:** 11
**Page:** 1
### Author:  [@Amberplop](https://forums.yoyoexpert.com/u/Amberplop)
#### Post date: [March 10, 2013, 3:13am UTC](https://forums.yoyoexpert.com/t/what-is-a-side-effect/50593/1 "2013-03-10T03:13:11Z")
Does they Work like hubstacks?
Its better a yoyo with side effects?
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### Author:  [@PlasticWhip](https://forums.yoyoexpert.com/u/PlasticWhip)
#### Post date: [March 10, 2013, 3:16am UTC](https://forums.yoyoexpert.com/t/what-is-a-side-effect/50593/2 "2013-03-10T03:16:08Z")
> [@Amberplop](#):
>
> Does they Work like hubstacks?
> Its better a yoyo with side effects?
Side Effects are an axle system that allow you to easily change the weight and appearance of the yoyo. They are used on many One Drop yoyos.
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### Author:  [@Amberplop](https://forums.yoyoexpert.com/u/Amberplop)
#### Post date: [March 10, 2013, 3:24am UTC](https://forums.yoyoexpert.com/t/what-is-a-side-effect/50593/3 "2013-03-10T03:24:26Z")
Thank you hey does the side effect have ball bearing ( like hubstacks )
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### Author:  [@xmotoby](https://forums.yoyoexpert.com/u/xmotoby)
#### Post date: [March 10, 2013, 3:28am UTC](https://forums.yoyoexpert.com/t/what-is-a-side-effect/50593/4 "2013-03-10T03:28:13Z")
No it does not. They are just there to change the weight and looks of the yoyo.
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### Author:  [@GregP](https://forums.yoyoexpert.com/u/GregP)
#### Post date: [March 10, 2013, 3:32am UTC](https://forums.yoyoexpert.com/t/what-is-a-side-effect/50593/5 "2013-03-10T03:32:22Z")
To expand on that a bit more-- where there are normally threads for your axle in a yoyo half, yoyos that use side effects basically have a hole. It’s a hole of a certain dimension, but a hole nonetheless.
The side effects are a tight press fit into these holes, providing the threads for the axle while at the same time allowing different designs (which affect both weight and appearance) in the cup.
They DID make a hubstack-like side effect called the RSM (Rotating Side Member) but as far as I can tell it is no longer available new.
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### Author:  [@Amberplop](https://forums.yoyoexpert.com/u/Amberplop)
#### Post date: [March 10, 2013, 3:42am UTC](https://forums.yoyoexpert.com/t/what-is-a-side-effect/50593/6 "2013-03-10T03:42:26Z")
Thanks what a shame theres no more RSM
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### Author:  [@Bcmaddog](https://forums.yoyoexpert.com/u/Bcmaddog)
#### Post date: [March 10, 2013, 2:02pm UTC](https://forums.yoyoexpert.com/t/what-is-a-side-effect/50593/7 "2013-03-10T14:02:10Z")
> [@Amberplop](#):
>
> Thanks what a shame theres no more RSM
RSM?
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### Author:  [@GregP](https://forums.yoyoexpert.com/u/GregP)
#### Post date: [March 10, 2013, 5:35pm UTC](https://forums.yoyoexpert.com/t/what-is-a-side-effect/50593/8 "2013-03-10T17:35:50Z")
> [@Bcmaddog](#):
>
> > [@Amberplop](#):
> >
> > Thanks what a shame theres no more RSM
>
> RSM?
Dude, it’s ONE REPLY above hers!!!
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### Author:  [@Bcmaddog](https://forums.yoyoexpert.com/u/Bcmaddog)
#### Post date: [March 10, 2013, 8:29pm UTC](https://forums.yoyoexpert.com/t/what-is-a-side-effect/50593/9 "2013-03-10T20:29:27Z")
> [@GregP](#):
>
> > [@Bcmaddog](#):
> >
> > > [@Amberplop](#):
> > >
> > > Thanks what a shame theres no more RSM
> >
> > RSM?
>
> Dude, it’s ONE REPLY above hers!!!
Hehehehehehehe.
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### Author:  [@Yonut](https://forums.yoyoexpert.com/u/Yonut)
#### Post date: [March 11, 2013, 2:14pm UTC](https://forums.yoyoexpert.com/t/what-is-a-side-effect/50593/10 "2013-03-11T14:14:25Z")
> [@Amberplop](#):
>
> Thanks what a shame theres no more RSM
Meh. RSMs are soooo heavy.
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### Author:  [@Jagmcool](https://forums.yoyoexpert.com/u/Jagmcool)
#### Post date: [March 11, 2013, 7:33pm UTC](https://forums.yoyoexpert.com/t/what-is-a-side-effect/50593/11 "2013-03-11T19:33:10Z")
I need to get my hands on some stunt pegs.