You need to compress the bearings to tension the bolt, if you have the wrong one or no spacers it will fall out
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The shoulder bolt should tighten all the way down, I recommend at least a spacer ring between the hanger and the first bearing and the outside bearing and bolt face. After that its just adjusting so you have tension on the threads but you aren’t crushing the bearings.
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Perfect, thanks guys!!
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I’m using the BN 270’s with Superstars and center set bearing spacers, they work just fine. The bearing rests against the 10mm part of the stepped axel, works like a speed ring.
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Shit, Trampa told me to order the offset spacer. We’ll see how that works out, thanks for the input regardless 
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@computers @ZachTetra @Boardnamics
Wheels came in today, I ended up going with the offset spacer and those work perfectly!
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has anyone used the 270 with metro wheels?
I have Urban treads on 270s
with metro wheels?
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You would need to use the surf rods shoulder bolts I think
thank you, i will look into that. would it be 80 or 90mm
Those hubs are like 35mm bearing to bearing. BD’s axles have 40mm of 8mm thread 
OR you could run a 638 bearing on the outside half of the hub and a 16100 on the inside. Did something like that on some evolve trucks that have itty bitty axles.
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