What size headset does the Stigmata use?

1 1/8”

What size seatpost do I need?

31.6mm

What size seat collar does the Stigmata need?

34.9mm (supplied with frame)

Are there disc brake mounts on the Stigmata? How about fender mounts?

Nope, none of the above. It’s a race bike. Use some cantilevers…

How big of a tire will it fit?

It was designed to accept 700x 35 tires max. Some 38s will fit in there, depending on brand, and how concerned you are with mud clearance.

What kind of crank/bb do I need?

The Stigmata is designed around road cranks, so there is plenty of room for big chainrings and narrow chainline cranks. 68mm bb shell.

Can I use mountain bike cranks and bb?

Mountain bike cranks are designed for a 135mm dropout spacing, so the chainline will be a little wide. It would work, but wouldn’t be ideal.

What front derailleur do I need for my Stigmata?

34.9 bottom swing (“traditional”), bottom pull road derailleur.

Does Santa Cruz sell the Stigmata as a complete bike?

Not at this time, just a frame only for now.

What size rear hub fits in the Stigmata?

130x10mm. Standard road size.