The GO-TO of The Death Projects

Drivetrains:   e*thirteen HelixR cassette (9-50t 12 speed), TRP TR12 Shifter/derailleur, e*13 carbon (or alloy) cranks and ring, riding in a e*13 BB, all tied together with a YBN chain.

Why:  My go to drive train.  Period.  And yes, the SRAM AXS is really nice!  But very high end and not any better than this option, IMHO.  I use this setup on EVERY build, even gravel bikes!  The setup shifts flawlessly and is super easy to setup with some slick features! And I've not had an issue, AT ALL, in years with any of this. The Cranks are Super light (lightest out there) and super strong.  The BB's hold up for a LONG time and the chains are bulletproof.  Light.  Fast shifting and superb!

Tires:  In a nutshell?  The wider the better!!  Always!  Weight be damned.  Really.  Just go big!  Better grip, no less rolling resistance and super plush when needed!  2.6" on my MTB's, 3" on my touring bikes, 50+mm on my gravel/city bikes!  Fast, functional and durable!  And extra grippy if you need it!