It look's like someone may have fitted a 35mm o/d, 15mm i/d bearing into a 37mm o/d, 12mm i/d bearing hub.
Does your hub i/d measure 37mm ?
And the o/d of your bearing measure 35mm ?
well... that makes me pretty sad... know where i can get a single IMR-Racing wheel from...?
Speedy sleeve...? that sounds fast... I might have a google of it.
The option i thought of last night (in my sleep wtf) was to use a strip of a coke can and push it in as a shim to take up the space... I will keep you posted.
You could also try an automotive brake reconditioning shop, they are alway's resleeving bore's of master /slave cylinder's so they may be able to help you out too
Speedy Sleeve's are around $40 - $50 including fitting
sooo I tried the strips of can trick and am pretty happy with how snug the bearing is now.
I was kinda a little sad that the idea had been thought of before though ha ha. I took photos as i went along thinking i could share this awesome idea, only to get back to my pc and see your post about the idea ha ha