# MR85 Bimetal Prototype FS

**URL:** <https://forums.yoyoexpert.com/t/mr85-bimetal-prototype-fs/444212>\
**Category:** Buy / Sell / Trade\
**Created:** [April 19, 2026, 9:26pm UTC](https://forums.yoyoexpert.com/t/mr85-bimetal-prototype-fs/444212 "2026-04-19T21:26:20Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Cdl12b](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/cdl12b/32/659678_2.png) [@Cdl12b](https://forums.yoyoexpert.com/u/Cdl12b)\
**Post date:** [April 19, 2026, 9:26pm UTC](https://forums.yoyoexpert.com/t/mr85-bimetal-prototype-fs/444212/1 "2026-04-19T21:26:20Z")

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I have one of these that I’m listing up for sale here. As of right now, the project does not have a name, so feel free to offer up suggestions if anything comes to mind. Five prototypes of this were made. Specs and pricing can be found below:

Diameter: 50mm  
Width 42.5mm  
Mass: ~59.5g  
Bearing: 4mm wide MR85  
Response: RBC spec pads  
Axle: 8mm  
Materials: 7075 + SS304

 ![IMG4288](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/f/5/1/f51af9fb13105beb18e8ed8533e514382cfd9280.jpeg)  
 ![IMG4289](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/3/6/6/36619737d349862602488cfb9cc015d1f5bf6b63.jpeg)  
 ![IMG4290](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/9/f/a/9fa7ff76843a6474df3e6b350b66eb1e98049eeb.jpeg)

Price: $120 Shipped to the CONUS

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**Author:** ![Tshou](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/tshou/32/611160_2.png) [@Tshou](https://forums.yoyoexpert.com/u/Tshou)\
**Post date:** [April 19, 2026, 9:40pm UTC](https://forums.yoyoexpert.com/t/mr85-bimetal-prototype-fs/444212/2 "2026-04-19T21:40:33Z")

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oh my

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**Author:** ![Cdl12b](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/cdl12b/32/659678_2.png) [@Cdl12b](https://forums.yoyoexpert.com/u/Cdl12b)\
**Post date:** [April 20, 2026, 10:45pm UTC](https://forums.yoyoexpert.com/t/mr85-bimetal-prototype-fs/444212/3 "2026-04-20T22:45:22Z")

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Bump

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**Author:** ![Cmchappell97](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/cmchappell97/32/699328_2.png) [@Cmchappell97](https://forums.yoyoexpert.com/u/Cmchappell97)\
**Post date:** [April 22, 2026, 8:01pm UTC](https://forums.yoyoexpert.com/t/mr85-bimetal-prototype-fs/444212/4 "2026-04-22T20:01:23Z")

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Just got mine in! This thing is crazy fun, definitely don’t sleep on it!

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**Author:** ![system](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/system/32/8054_2.png) [@system](https://forums.yoyoexpert.com/u/system)\
**Post date:** [May 22, 2026, 8:02pm UTC](https://forums.yoyoexpert.com/t/mr85-bimetal-prototype-fs/444212/5 "2026-05-22T20:02:15Z")

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