Originally Posted by
thequickfix
When you say the BB is the wrong size, does that mean the chainline is way off?
I have an IRO crank and BB that give a chainline pretty close to 42 mm. I have been putting quite a few miles on that setup through all kinds of weather and the BB has held up way better than I expected.
In short, why not just get the IRO BB? It's a great value.
1) probably. i don't have a caliper, so i haven't been able to accurately measure the chainline yet-- however, i do know that a. the bb size is
not the iro recommended 110, and b. the sound is almost unmistakably a bad chainline noise. so while it's not 100% that the problem is with spindle size, i'm betting it is (i'll know for sure tonight, though).
2) i'm more concerned about something that'll last and spin well than something that's a good budget. she rides over 100 miles a week (sometimes a more) on that bike, in crappy weather, hills, etc. if there's a better square taper than the iro rebadge, i'd like to go that route. if it's absolutely not necessary, then fine-- but i'd rather buy her a $70 bb that works well forever than a $20 that lasts a year. she seems to have trouble identifying problems, so i'd rather rebuild the drivetrain to last.