# Needing Help With Bearings

**URL:** <https://forums.yoyoexpert.com/t/needing-help-with-bearings/37648>\
**Category:** Yo-Yo Mods and Maintenance\
**Created:** [May 11, 2012, 2:22am UTC](https://forums.yoyoexpert.com/t/needing-help-with-bearings/37648 "2012-05-11T02:22:45Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Bert34Lax](https://avatars.discourse-cdn.com/v4/letter/b/9d8465/32.png) [@Bert34Lax](https://forums.yoyoexpert.com/u/Bert34Lax)\
**Post date:** [May 11, 2012, 2:22am UTC](https://forums.yoyoexpert.com/t/needing-help-with-bearings/37648/1 "2012-05-11T02:22:45Z")

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I have the ILYY St. Eel, Im wondering does the KonKave Size D bearing fit it or is there i differance, also i have the Yomega Firestrom wondering what would work with that one, And the Hyperwarp

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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:** [May 11, 2012, 6:13am UTC](https://forums.yoyoexpert.com/t/needing-help-with-bearings/37648/2 "2012-05-11T06:13:42Z")

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> [@Bert34Lax](#):
>
> I have the ILYY St. Eel, Im wondering does the KonKave Size D bearing fit it or is there i differance, also i have the Yomega Firestrom wondering what would work with that one, And the Hyperwarp

The bearing dimensions for the St. Eel is 5X11X5, which is a size D, so theoretically the D-sized KK shojld fit.

Never heard of the Yomega Firestorm. The Hyperwarp uses a non-standard bearing(isn’t an A/B/C or D). You might have to contact Yomega to get answers.

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**Author:** ![Bert34Lax](https://avatars.discourse-cdn.com/v4/letter/b/9d8465/32.png) [@Bert34Lax](https://forums.yoyoexpert.com/u/Bert34Lax)\
**Post date:** [May 12, 2012, 1:28am UTC](https://forums.yoyoexpert.com/t/needing-help-with-bearings/37648/3 "2012-05-12T01:28:58Z")

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I understand that but im wondering what the KMK 5×11×5mm, stand for is there i differance or what?

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**Author:** ![jhb8426](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/jhb8426/32/631_2.png) [@jhb8426](https://forums.yoyoexpert.com/u/jhb8426)\
**Post date:** [May 12, 2012, 3:38am UTC](https://forums.yoyoexpert.com/t/needing-help-with-bearings/37648/4 "2012-05-12T03:38:31Z")

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Size matters…  
As long as it’s a 5×11×5mm it will work fine. KMK is just some manufacturers designation.

Really the 5x11 part is the most critical. The number sequence is Inside Diameter x Outside Diameter x Width. The first 2 really determine if it will fit. HSPIN uses the same size bearing and frankly for me they are too wide. I’ve replaced all of my 5 mm wide bearings w/4 mm wide ones.

Older Yomega std bearing size: 4 mm x 8 mm x 3 mm (.156 in x .312 in x .125 in)

You can get bearings of assorted sizes at a local hobby shop - RC car department.