I squeeze a 130mm rear hub into dropouts with 126mm spacing. Works fine, save for the fact that the chain rubs against the seatstay when I'm in my highest gear. I'm wondering what my options are here? Here are the particulars:
1986 Bianchi Campione d'Italia
1997 Record hub
13-23 9-speed cassette
Last year one of the guys at the bike shop gave me a washer to jam in there. It worked, but I didn't like the idea of spreading the chainstays that extra millimetre, and the washer made it even more cumbersome and difficult to install the wheel, so I stopped using it. For the longest time I have simply stayed out of my 48-13, but lately I've been riding faster down hills, and would really like to utilize that last cog.
Two questions come to mind: Is there a more elegant way of moving the cassette away from the seatstay? And does this rubbing indeed happen because I'm putting a 130mm hub onto a bike with 126mm rear spacing?