I'm sorry about the confusion to the earlier responder, but when I said I was thinking about upgrading to a 10 spd from a 6 spd, I meant the cassette cogs. I got home late with the bike and tried squeezing the 130 wheel on the 126 spread. Is there a technique to this? It's like trying to spread a chicken wishbone while trying to stuff a bagel em-between it. I was working outside and it was getting dark so I quit, but it never did fully seat in the drop out. Are there concerns about damaging the brake bridge if you spread too far?