I bought a nice single speed bike from ebay that I'm really happy with after my last one was stolen (aaarghh!). Unfortunately the rear wheel was converted by taking off the gear cogs and replacing them with a single free-wheel. This means there is a bit of space there and the chain is very very slightly out of line meaning that it is liable to come off. I'd like to buy a rear wheel with single-speed and perhaps a flip flop hub with fixed on the other side so I can change over if I want. Anyone got any suggestions? My budget realistically would be up to £70. Thanks.
