I bought a frame in November and have been struggling with which fork length to get before I assemble the new ride. I will be riding in the PNW mostly planning to do XC trails.

Should I look for 100mm or 120mm fork? In terms of comfort and handling. I am aware of the trade off.

Is there a risk to the frame with a longer fork?

Bonus question, can you run 2.4" tires on this frame? The Ritchey site says 2.25 max but i have seen builds running 2.4. Thoughts?