Hmmm, I'd say you risk wearing the sides of the cassette cogs which could lead to all kinda shit down the line. For the price of a 5,6,7,8 speed chain, just buy it.
Mech hanger should be saveable, the shop should have an alignment tool, if they don't, find a new LBS.
Chances are if the hanger "looks" slightly bent then in reality it's buggerfucked. A hanger that's slightly bent will be hard to identify with the naked eye, you need to get something on there that extends it, such as the alignment tool does.
Hmmm, I'd say you risk wearing the sides of the cassette cogs which could lead to all kinda shit down the line. For the price of a 5,6,7,8 speed chain, just buy it.
Mech hanger should be saveable, the shop should have an alignment tool, if they don't, find a new LBS.
Chances are if the hanger "looks" slightly bent then in reality it's buggerfucked. A hanger that's slightly bent will be hard to identify with the naked eye, you need to get something on there that extends it, such as the alignment tool does.