Originally Posted by
zen_
I admit to not reading through the whole thread here, but you can get Megaexo (FSA's smaller spindle) Omega cranks from FSA's website directly for $145 looks like without changing out your BB or front mech. You might be able to find it cheaper from a European merchant.
This is it here, but it's out of stock:
https://shop.fullspeedahead.com/en/p...omega-crankset
Just the rings (also out of stock):
https://shop.fullspeedahead.com/en/t...chainring-3580
I've ordered this for the 30t ring:
https://www.bikeparts.co.uk/products...7e89692d&_ss=r
It looks like I need to buy a 120 BCD 46t ring that's compatible with the 30t, though I don't quite understand the fitting.. From looking at the crankset (without taking it off, which I was hoping to avoid until I had the new rings to go on), both chainrings connect to the spider with the same bolts, and that seems to be at 90mm.
That doesn't fit with the sizing there or the 90/120BCD printed on the 48T chainring. So is it really a 120BCD for the outer ring, with a 90BCD mount for the inner ring?
Not that it really helps, because the only 46t rings I can find in stock are FSA road rings (vs adventure, if it makes a difference) and much more expensive than I would expect (£50+ vs £20), or completely undescribed on Amazon.
I had no idea that cranksets would be so complicated or incompatible! That said, I'll try the 48/30t combo first whilst I keep looking.