A couple months ago I posted a thread asking about the Nashbar flip flop rear hub, seemed like a decent buy, so I bought it. Fast forward to today, I was taking my bike apart to get it all cleaned up and ready for the conversion and I pulled out that hub, turns out it doesn't fit.

It's a little to wide. Is there anything I can really do or am I screwed? The bike is an old Nishiki Century if that matters. thanks guys.