Hi everyone,
I'm not 100% bike-tech savvy but here goes: My BB needs replacing [play & a bit crunchy], the specs on the stock one are 68 x 124.5. The current chainline is about 50 mm. Seat-tube diameter is 34mm. The clearance between frame & chainring now is 2 mm max. The largest chainring is mounted outside the spider, the 2 smaller are inside.
The closest BB's to 124.5mm I've found are 122.5mm & 127mm. I'm not quite sure how spacers work, but if I use the 122.5 & move the chainring 1 or 2mm out that should be about spot on. Will a spacer do the trick? I can't quite figure out where a spacer fits/how it works.
Thanks all - & nice to be here.
K
I'm not 100% bike-tech savvy but here goes: My BB needs replacing [play & a bit crunchy], the specs on the stock one are 68 x 124.5. The current chainline is about 50 mm. Seat-tube diameter is 34mm. The clearance between frame & chainring now is 2 mm max. The largest chainring is mounted outside the spider, the 2 smaller are inside.
The closest BB's to 124.5mm I've found are 122.5mm & 127mm. I'm not quite sure how spacers work, but if I use the 122.5 & move the chainring 1 or 2mm out that should be about spot on. Will a spacer do the trick? I can't quite figure out where a spacer fits/how it works.
Thanks all - & nice to be here.
K