# MR-85 or A Bearing in this Throw? **URL:** \ **Category:** General Yo-Yo\ **Created:** [March 20, 2025, 1:03pm UTC](https://forums.yoyoexpert.com/t/mr-85-or-a-bearing-in-this-throw/421342 "2025-03-20T13:03:42Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![rkalajian](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/rkalajian/32/672584_2.png) [@rkalajian](https://forums.yoyoexpert.com/u/rkalajian)\ **Post date:** [March 20, 2025, 1:03pm UTC](https://forums.yoyoexpert.com/t/mr-85-or-a-bearing-in-this-throw/421342/1 "2025-03-20T13:03:42Z")
Just curious, I’m as I’m _super_ familiar with either. ![signal-2025-03-20-090244_002](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/9/f/5/9f542bd6b92580cd55647a6ce9d592687c6d16bd.jpeg) ---
**Author:** ![Jdrabik](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/jdrabik/32/1110_2.png) [@Jdrabik](https://forums.yoyoexpert.com/u/Jdrabik)\ **Post date:** [March 20, 2025, 1:09pm UTC](https://forums.yoyoexpert.com/t/mr-85-or-a-bearing-in-this-throw/421342/2 "2025-03-20T13:09:20Z")
I couldn’t say but that throw looks super interesting, where did you get it? ---
**Author:** ![spyder-man](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/spyder-man/32/599092_2.png) [@spyder-man](https://forums.yoyoexpert.com/u/spyder-man)\ **Post date:** [March 20, 2025, 1:17pm UTC](https://forums.yoyoexpert.com/t/mr-85-or-a-bearing-in-this-throw/421342/3 "2025-03-20T13:17:01Z")
Hard to tell for certain from the pic but looks way more A than MR85 to me. MR85 A D Blank C Blank ![IMG_3800](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/a/d/9/ad962cfa3c4335dec6fb0934f78773d48eb726a7.jpeg) ---
**Author:** ![rkalajian](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/rkalajian/32/672584_2.png) [@rkalajian](https://forums.yoyoexpert.com/u/rkalajian)\ **Post date:** [March 20, 2025, 1:21pm UTC](https://forums.yoyoexpert.com/t/mr-85-or-a-bearing-in-this-throw/421342/4 "2025-03-20T13:21:21Z")
I got it at a Pride festival last year from a local artisan, Turning a Tilly ([https://www.turningatilly.com/](https://www.turningatilly.com/)) ---
**Author:** ![Son-of-Morris](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/son-of-morris/32/250533_2.png) [@Son-of-Morris](https://forums.yoyoexpert.com/u/Son-of-Morris)\ **Post date:** [March 20, 2025, 1:25pm UTC](https://forums.yoyoexpert.com/t/mr-85-or-a-bearing-in-this-throw/421342/5 "2025-03-20T13:25:20Z")
Brass response looks like a Boise, if so, you’re in luck, you likely have an exciting “E” bearing in there. E - Fits the Spintastics Tornado 2, Tigershark, Riot, Great White, Comet, Torch, and Firefly, and Yomega small bearing yo-yos such as the Raider. Can check the specs, but should be around 3.962 x 7.925 x 3.175mm Similar in size to the Mighty Flea (Size K, 4 x 8 x 3mm) ![image](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/3/8/4/384f2231d9c5220ddfd66977e855ba936d4a53aa.png) ---
**Author:** ![Slestak75](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/slestak75/32/212315_2.png) [@Slestak75](https://forums.yoyoexpert.com/u/Slestak75)\ **Post date:** [March 20, 2025, 1:35pm UTC](https://forums.yoyoexpert.com/t/mr-85-or-a-bearing-in-this-throw/421342/6 "2025-03-20T13:35:37Z")
Are you certain that’s not an MR84? A looper bearing. It looks like it could be that. Hard to say from the pic though. ---
**Author:** ![Slestak75](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/slestak75/32/212315_2.png) [@Slestak75](https://forums.yoyoexpert.com/u/Slestak75)\ **Post date:** [March 20, 2025, 1:38pm UTC](https://forums.yoyoexpert.com/t/mr-85-or-a-bearing-in-this-throw/421342/7 "2025-03-20T13:38:57Z")
MR84 is a more industry standard nomenclature for that bearing. Many RC vehicles use these as well so there are some good and affordable sources out there if you look up MR84 ---
**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:** [March 20, 2025, 1:48pm UTC](https://forums.yoyoexpert.com/t/mr-85-or-a-bearing-in-this-throw/421342/8 "2025-03-20T13:48:03Z")
There are also size I bearing as found in Tom Kuhns and BCs: \* **Size I** - Fits all [Tom Kuhn](https://yoyo.fandom.com/wiki/Tom_Kuhn) ball bearing yo-yos. Measures .125" x .312" x .140" ![image](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/b/7/5/b75a459a2575adca2c4326d80488d949296fb49d.jpeg) > **[Tom Kuhn Silver Bullet 2](https://yoyo.fandom.com/wiki/Tom_Kuhn_Silver_Bullet_2)** > > The Silver Bullet 2 (SB-2 for short) was the successor model to the original Silver Bullet. Released by Tom Kuhn in 1990, the yo-yo featured the first modern ball bearing axle and a patented string gap adjustment mechanism. By unscrewing the yo-yo... > **[Ball Bearings](https://yoyo.fandom.com/wiki/Ball_Bearings)** > > Ball bearings, in the context of yo-yo play, were introduced in the early 1990s. They are used to reduce friction while the yo-yo is sleeping. A ball bearing yo-yo can be played in two extreme states. One configuration involves using a thick... ---
**Author:** ![AudreySickburn](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/audreysickburn/32/313292_2.png) [@AudreySickburn](https://forums.yoyoexpert.com/u/AudreySickburn)\ **Post date:** [March 20, 2025, 1:57pm UTC](https://forums.yoyoexpert.com/t/mr-85-or-a-bearing-in-this-throw/421342/9 "2025-03-20T13:57:02Z")
99% certain this is correct. If you need to buy another bearing for it in the future Rob it’s part number is R155 E. If you have calipers give it a measure and we will know for sure. ---
**Author:** ![rkalajian](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/rkalajian/32/672584_2.png) [@rkalajian](https://forums.yoyoexpert.com/u/rkalajian)\ **Post date:** [March 20, 2025, 1:59pm UTC](https://forums.yoyoexpert.com/t/mr-85-or-a-bearing-in-this-throw/421342/10 "2025-03-20T13:59:54Z")
Well…I’ve been meaning to buy some calipers. Guess I will now. Thanks, all! ---
**Author:** ![AudreySickburn](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/audreysickburn/32/313292_2.png) [@AudreySickburn](https://forums.yoyoexpert.com/u/AudreySickburn)\ **Post date:** [March 20, 2025, 2:03pm UTC](https://forums.yoyoexpert.com/t/mr-85-or-a-bearing-in-this-throw/421342/11 "2025-03-20T14:03:12Z")
FYI this $10 plastic seemingly cheapo pair has been more accurate for me than my more expensive stainless ones. It’s the only caliper that gave me an accurate reading of my black mamba steel bearing. > **[Amazon.com: WEN 10761 Electronic 6.1-Inch Digital Caliper with LCD Readout and...](https://www.amazon.com/WEN-10761-Electronic-6-1-Inch-Digital/dp/B07HFTFCFV)** > > Remember when you had maximum precision in your measurements? Get the accuracy you need with the WEN Digital Caliper. The WEN calipers are designed to undergo four different methods of measurement, including inner, outer, step, and depth... ---
**Author:** ![Captrogers](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/captrogers/32/647012_2.png) [@Captrogers](https://forums.yoyoexpert.com/u/Captrogers)\ **Post date:** [March 20, 2025, 2:03pm UTC](https://forums.yoyoexpert.com/t/mr-85-or-a-bearing-in-this-throw/421342/12 "2025-03-20T14:03:34Z")
Ohh yeah those are the same brass fit guts that Boise uses which does use an E bearing. Which is similar in size just different inner diameter to an mr85