# Duncan Mod Spacers **URL:** \ **Category:** Yo-Yo Mods and Maintenance\ **Created:** [January 12, 2020, 1:20am UTC](https://forums.yoyoexpert.com/t/duncan-mod-spacers/313470 "2020-01-12T01:20:09Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![PCaliyoyos](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/pcaliyoyos/32/108396_2.png) [@PCaliyoyos](https://forums.yoyoexpert.com/u/PCaliyoyos)\ **Post date:** [January 12, 2020, 1:20am UTC](https://forums.yoyoexpert.com/t/duncan-mod-spacers/313470/1 "2020-01-12T01:20:09Z")
do the Duncan mod spacers only work on Offstring throws? or can you put them in let’s say, the Butterfly XT? and are they worth it? ---
**Author:** ![JWaugh](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/jwaugh/32/42366_2.png) [@JWaugh](https://forums.yoyoexpert.com/u/JWaugh)\ **Post date:** [January 12, 2020, 1:29am UTC](https://forums.yoyoexpert.com/t/duncan-mod-spacers/313470/2 "2020-01-12T01:29:40Z")
LOL, 1: they are for the old Duncan offstrings, 2: no, 3: no ---
**Author:** ![PCaliyoyos](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/pcaliyoyos/32/108396_2.png) [@PCaliyoyos](https://forums.yoyoexpert.com/u/PCaliyoyos)\ **Post date:** [January 12, 2020, 1:30am UTC](https://forums.yoyoexpert.com/t/duncan-mod-spacers/313470/3 "2020-01-12T01:30:42Z")
😐 ---
**Author:** ![PCaliyoyos](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/pcaliyoyos/32/108396_2.png) [@PCaliyoyos](https://forums.yoyoexpert.com/u/PCaliyoyos)\ **Post date:** [January 12, 2020, 1:35am UTC](https://forums.yoyoexpert.com/t/duncan-mod-spacers/313470/4 "2020-01-12T01:35:44Z")
please close 😐 ---
**Author:** ![pmdon](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/pmdon/32/62892_2.png) [@pmdon](https://forums.yoyoexpert.com/u/pmdon)\ **Post date:** [January 12, 2020, 2:19am UTC](https://forums.yoyoexpert.com/t/duncan-mod-spacers/313470/5 "2020-01-12T02:19:53Z")
> [@What are you throwing today?](https://forums.yoyoexpert.com/t/what-are-you-throwing-in-2019-2020/296879/775): > > Duncan Butterfly XT with Mod spacers flipped for A bearings and with weight rings inside the caps. 55mm Dia x 48mm Wide and 68 grams. Super Wide Plastic A bearing fun. [20190327\_151706] [20190327\_151726] ---
**Author:** ![Exmime](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/exmime/32/40143_2.png) [@Exmime](https://forums.yoyoexpert.com/u/Exmime)\ **Post date:** [January 12, 2020, 2:22am UTC](https://forums.yoyoexpert.com/t/duncan-mod-spacers/313470/6 "2020-01-12T02:22:21Z")
Here some more on Mod Spacers > [@A Sized Bearing YoYo Love (Small Bearings)](https://forums.yoyoexpert.com/t/a-sized-bearing-yoyo-love/297062/63): > > When it comes to A bearing YoYos Duncan has the most options. They also offer options to flip between either A or C bearings as well (Flipside). This was a fun mod using cheap Duncans from the big box stores toy aisle. I’m calling it my Super Wide Butterfly XT-A bearing. Using the mod spacers from a Pro Z pack with the spacers flipped to the A size. This is a wide 48mm and is weighing in at 68 grams with weight rings. If you cant afford a Moster Edge this is option for you. I also like running t… ---
**Author:** ![twitch77](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/twitch77/32/60219_2.png) [@twitch77](https://forums.yoyoexpert.com/u/twitch77)\ **Post date:** [January 12, 2020, 3:28am UTC](https://forums.yoyoexpert.com/t/duncan-mod-spacers/313470/7 "2020-01-12T03:28:36Z")
The Duncan Pro Z comes with mod spacers, a C size Concave bearing and a A size bearing…so if you want mod spacers, it might be worth tracking down a new Pro Z.