When do you perform a tune up?

On a new build I’ll check the torque on my headset, stem, brake calipers, crank arms if applicable, and seat post after the first few rides. If the shifters are mechanical, I’ll adjust as the cables stretch and I get clicking. Otherwise there’s nothing really to tune up unless it goes out of spec and causes issues. Like poor shifting, tubeless tires not holding air, pinging spokes, dragging rotors, soft brake levers, etc.

A formal tune up…usually once every year or two depending on how much and how hard I rode. If a lot of mud and dirt and long rides…probably annually. If more road than gravel/dirt…every two. That said, really your comfort level. But to make it clear, when I say tune up, not talking basic stuff like lubing the chain and refilling sealant or general tightening of bolts and stuff. I mean having a bike shop take it apart and really clean/service it and perhaps even repack or replace some bearings and such. Hope that helps. One last thing I would add is if you’re able to learn some basic maintenance, it’ll go a long way to not needing the full on tune up or serving too often.

I usually put mine in a stand when something starts annoying me to the point that I have the ambition to take it apart to service it, but I do all my own maintenance.