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.ben
@youClown
I have never understood how BB/crank/hub compatibility worked until today and just assumed the LBS would have fitted the correctly-sized one for my cranks when I last got the BB replaced. They have not done so, and when I recently replaced the BB I used the measurements they did rather than going by the crank manufacturer's recommendations, so now I have a 113mm BB instead of the recommended 107 and I am having chainline issues - drivetrain is fairly noisy (particularly after a rainy day when I forget to reapply lube) and I think my chain has been worn having only changed it three months ago.
Am pretty keen to keep the BB because I had to search high and low for the UN55 I've now got in there and paid a pretty penny for it, and am thinking of shifting the chainring inside of the spider rather than outside. Are there safety concerns with doing that if there are no indents on the spider (i.e. the ring was designed to go on the outside)? Am riding a fixed gear conversion and so rear spacing is 130mm but rear wheel is 120mm with spacers; I am alternatively considering shifting the spacers to the NDS then dishing the wheel towards the NDS to re-centre - which would be the better solution? Would far prefer not to have to dish the wheel as I have never built a wheel before and would have no idea what I'm doing, but I presume just loosening the DS and tightening NDS will achieve the necessary effect, then I can centre the wheel in the frame using the brakes as a guide.