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I picked up some NOS Pro-Line 2639 2.2" front wheels for the B2 and B3, but am having a problem. The inner bearing fits perfectly properly, but the outer bearing falls into the wheel and does not fit snug.

I used my caliper, and the inner bearing area is 0.3745 (pretty much exactly what you would expect for 3/8) but the outer bearing area is 0.381 and is enough that the bearing falls into place and "rattles" when you shake the wheel...

Any ideas?? Do these wheels require a custom bearing of some sort?

That's normal for the PL wide wheel, when the nut is in place ( I reccomend a shim ) then it is aok-
if you don't like it though and the wheels are new, I know someone that is looking for them to race with- But it is no problem-

I'd be happy to trade them off for some wide 2.2 b2/b3 wheels where the bearing fits snug. Do the genuine Associated fit? are there any other options?

I have three sets. all brand new, never seen glue.