# Bearing sizes **URL:** \ **Category:** General Yo-Yo\ **Created:** [May 5, 2019, 1:23am UTC](https://forums.yoyoexpert.com/t/bearing-sizes/301974 "2019-05-05T01:23:56Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![DrRockso](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/drrockso/32/52896_2.png) [@DrRockso](https://forums.yoyoexpert.com/u/DrRockso)\ **Post date:** [May 5, 2019, 1:23am UTC](https://forums.yoyoexpert.com/t/bearing-sizes/301974/1 "2019-05-05T01:23:56Z")
What are size c bearing measurements? ---
**Author:** ![dam720](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/dam720/32/51442_2.png) [@dam720](https://forums.yoyoexpert.com/u/dam720)\ **Post date:** [May 5, 2019, 1:29am UTC](https://forums.yoyoexpert.com/t/bearing-sizes/301974/2 "2019-05-05T01:29:05Z")
1/4" x 1/2" x 3/16" or 6.35 x 12.7 x 4.7498mm Hope this helps!! ---
**Author:** ![DrRockso](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/drrockso/32/52896_2.png) [@DrRockso](https://forums.yoyoexpert.com/u/DrRockso)\ **Post date:** [May 5, 2019, 1:39am UTC](https://forums.yoyoexpert.com/t/bearing-sizes/301974/3 "2019-05-05T01:39:54Z")
Yes I was looking at roller skate and skateboard bearings I read somewhere they would work in yoyos…? ---
**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 5, 2019, 1:40am UTC](https://forums.yoyoexpert.com/t/bearing-sizes/301974/4 "2019-05-05T01:40:42Z")
Size A - 5mm x 10mm x 4mm. (fits most Duncan, Playmaxx, some YoYoFactory) Size B - 6.45mm x 9.525mm x .3.175mm(.250 x .375 x .125 inches). (small bearing YoYoJam yo-yos, SpinFaktors, Kamaitachi, Sunset Trajectory and Matrixx. It also fits the SuperYo Renegade, and the Spintastics Revolver and Eclipse. Size C - Fits the large bearing YoYoJam yo-yos including the Hitman, Lyn Fury, Spinmaster 2 and 3, Big Ben, Patriot, Nightmoves 2 and 3, Shockwave 3 and the Speeder, as well as the YoYoFactory G5 and 888. Measures 6.35mm x 12.7mm x4.7625mm(.250 x .500 x .187 inches). **Note:** Size C is used in many current (2019) model yoyos made by YYF and most other current manufacturers. Size D - Fits B.I.S.T., HSpin and SPYY yo-yos. Measures 5mm x 11mm x 5mm(.156 x .312 x .125 inches). Size E - Fits the Spintastics Tornado, Tigershark, Riot, Great White, Comet, Torch, and Firefly, and Yomega ball bearing yo-yos. Measures 3.96875mm x 7.9375mm x 3.175mm. (.156 x .312 x .125 inches) These bearings are usually made for a specific yo-yo or specific manufacturer. Size G - Fits all Custom yo-yos. Measures 4.7625mm x 7.9375mm x 3.175mm.(.187 x .375 x .125 inches) Size H - Fits the Sonic Spin and Invader by SuperYo. This bearing is made of plastic. Size I - Fits all Tom Kuhn ball bearing yo-yos. Measures 3.175 x 7.9248 x 3.556(.125 x .312 x .140 inches) Size M - This bearing fits the BigYo 2 by YoYoJam and is only available through special order. Size B - This bearing fits small bearing YoYoJam yo-yos, including SpinFaktors (but not the HG), Kamaitachi, Sunset Trajectory and Matrixx. It also fits the SuperYo Renegade, and the Spintastics Revolver and Eclipse. Measures 6.45mm x 9.525mm x .3.175mm(.250 x .375 x .125 inches). Size C - Fits the large bearing YoYoJam yo-yos including the Hitman, Lyn Fury, Spinmaster 2 and 3, Big Ben, Patriot, Nightmoves 2 and 3, Shockwave 3 and the Speeder, as well as the YoYoFactory G5 and 888. Measures 6.35mm x 12.7mm x4.7625mm(.250 x .500 x .187 inches). Size D - Fits B.I.S.T., HSpin and SPYY yo-yos. Measures 5mm x 11mm x 5mm(.156 x .312 x .125 inches). Size E - Fits the Spintastics Tornado, Tigershark, Riot, Great White, Comet, Torch, and Firefly, and Yomega ball bearing yo-yos. Measures 3.96875mm x 7.9375mm x 3.175mm. (.156 x .312 x .125 inches) editor’s note: ripped from yoyowiki. Update: ILYY - bearing size is given in the product descriptions on their website: 6 x 13 x 5 - all dimensions in Millimeter [mm] ---
**Author:** ![codinghorror](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/codinghorror/32/8052_2.png) [@codinghorror](https://forums.yoyoexpert.com/u/codinghorror)\ **Post date:** [May 5, 2019, 2:01am UTC](https://forums.yoyoexpert.com/t/bearing-sizes/301974/5 "2019-05-05T02:01:21Z")
Interesting! Can you even buy a new yo-yo today with any bearing size other than A, C, or D? (I don’t mean dead stock from 2010, I mean a new release) ---
**Author:** ![DrRockso](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/drrockso/32/52896_2.png) [@DrRockso](https://forums.yoyoexpert.com/u/DrRockso)\ **Post date:** [May 5, 2019, 2:22am UTC](https://forums.yoyoexpert.com/t/bearing-sizes/301974/6 "2019-05-05T02:22:05Z")
Idk I haven’t really looked i wouldn’t want a yoyo that big. I feel like it would be awkward to use. ---
**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 5, 2019, 3:19am UTC](https://forums.yoyoexpert.com/t/bearing-sizes/301974/7 "2019-05-05T03:19:20Z")
> [@codinghorror](#): > > Can you even buy a new yo-yo today with any bearing size other than A, C, or D? Other than the ILYY I added, probably not, but if you need a replacement for an existing yoyo, here’s your reference. ---
**Author:** ![vegabomb](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/vegabomb/32/199_2.png) [@vegabomb](https://forums.yoyoexpert.com/u/vegabomb)\ **Post date:** [May 5, 2019, 5:27am UTC](https://forums.yoyoexpert.com/t/bearing-sizes/301974/8 "2019-05-05T05:27:12Z")
> [@codinghorror](#): > > Interesting! Can you even buy a new yo-yo today with any bearing size other than A, C, or D? Most (all?) Tom Kuhn bearing yoyos are smaller than size A. ---
**Author:** ![RyoCanCan](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/ryocancan/32/163437_2.png) [@RyoCanCan](https://forums.yoyoexpert.com/u/RyoCanCan)\ **Post date:** [May 6, 2019, 10:18am UTC](https://forums.yoyoexpert.com/t/bearing-sizes/301974/9 "2019-05-06T10:18:01Z")
Also, C size bearing is a model R188 bearing, A is model R105, B is R168, D is R685, E is R155, just for a few. Good to know if you want to try n buy cheap bearings.