Originally Posted by SoSmellyAir

Let me let you in on a super secret: what you want is less at Bike Tires Direct than almost everywhere else: Shimano 105 FC-R7100 12 Speed Crankset [IFCR7100MX04] (biketiresdirect.com)

But you have to wait a couple of weeks for the 160 mm version.

It seems both you and everyone else here just assumes your bike has a HollowTech bottom bracket (common enough and fits Shimano cranks); is that the case? I don't know as my experience only started with the 11-speed 105-5800 generation.