crank replacement help
Ok so I have a ss conversion, and I did not do the conversion. I am very happy with the bike, and I do not have any chainline issues.
The bottom bracket has died and needs to be replaced. I would also like to go ahead and replace the crank because it is the old non replaceable chainring model, and I would like to drop down a bit in gearing. It is at 52/17 right now and I use this as a commuter. Its fast, and while I do live in flat florida, it would be nice not to be sweaty even on cool days when I get where I am going.
So basically I need some help replacing these parts without messing anything up. So what measurements do I need to take to maintain chainline? I am thinking about going to a 46 or 48 in the front with the 17 in the back, which might make using a mtn crank the easiest option. If I were keeping the crank I would just buy the same bb, but with changing it things get a little more complicated. Also, this is all to be done as cheap as possible. Thanks.