RSO Martian with some RSM SE’s from @yoyospirit 
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Man, it’s so good. Every time I pick mine up I am pretty blown away.
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Uhh, that Unknown End, tho 
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since I took it out … B!ST Competizione with beefcake bearing … here we really are in 2008!
The sound of beefcake! 
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lol
i forgot about beefcake bearings. is it 2 bearings with a long shaft?
that gap…i don’t know if i could bind that thing!
enjoy the throw my friends
kgb
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beefcake was kinda a funny, short lived idea that came from modding henry’s vipers if i’m not mistaken … i remember getting a spintastics GWS when they dropped… you could pretty easily make one from a tigershark though if you have enough axle length. it worked pretty well at the time.
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Aren’t two half-spec C bearings equivalent in width to a single full-size C bearing? Shouldn’t they produce the same gap width? In any event, I would expect a lot of potential for vibe, for instance if the two bearings don’t line up exactly due to poor bearing seat tolerances.
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yes, they are two half spec bearings coupled, this to take advantage of the smoothness of their edges so as to obtain a centering groove like on groove bearings. The yoyo’s gap increases slightly because they not are actually half as wide as a standard C but increase by 3-4 tenths of a mm, a minimum distance that doesn’t require a replacement of the axle. As for the atmosphere, no problem, the two bearings are placed in their respective seats.
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Sounds like a potentially interesting hack for a yoyo with too narrow a gap to begin with, e.g., my Dunk.
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Half-spec is 2/3s the width of a wide C bearing (2/16" vs 3/16")
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Then why are the two bearings always listed as 0.250 x 0.500 x 0.187 vs. 0.125 x 0.500 x 0.187? What part of the bearing is being measured here such that one is exactly half the other?
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The OD of both is 0.5"
The ID of both is 0.25"
Wide C bearings are 0.187" wide (3/16"
Slim C bearings are 0.125" wide (1/8")
The listing on YYE for YYF SPEC Half bearing is incorrect. It’s listing a 1/8" inner diameter instead of 1/4", but with the same width as the SPEC large bearing.
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