hopefully someone here can help. I am building a gravel/fireroad bike. The crankset is an FSA 130bcd with 46/38 WickWerks chainring. This is the only small set they sell for the 130bcd.
I want to run a SRAM drivetrain.
My problem is this. With a standard band mount ( frame doesn't have a braze on mount ) front derailleur, Rival or Apex, set at the proper height, the band is positioned directly over the lower waterbottle boss. not good for several reasons.
so, I was wondering if I can run a X-7 low band or is there any other SRAM front derailleur that has either a higher or lower mounting band than the Rival or Apex and can handle a 46t big ring??? Im not even sure if the X-7 2x10 will even handle a 46t ring....
This needs to be a bottom pull, 10 speed application.
I really don't want to use a braze-on adapter but if that is my last resort, so be it.
Thank you in advance for any help and advice you can give me.

I have to suppose that the frame was designed for smaller chainrings (or that the builder simply wasn't thinking).

In any case, you only options are a low band, of bottom bracket mount derailleur.

A typical braze-on adapter wouldn't work because the band is close to the height of a standard clamp-on band. In they make a low band braze-on adapter, that would be ideal, since it would allow the full selection of derailleur options.

The other option is to file out th lower boss, which is useless anyway. Or if there's enough meat on the band, file a clearance for the boss into the band.