These spares boxes are impressive. But it reminds me of the guy driving through Baja in his Toyota with practically one of everything in the back. First he breaks a leaf spring, and replaces it with his spare. Then he breaks an axel, replaces that too. Then he tears off his steering box, and his friends (who are driving stock vehicles with no spares at all) say, "If you weren't carrying 1000 pounds of parts, your truck might not break so much."
That's very true, and a balance has to be struck.
It's interesting that the thread title is "
critical spares" yet I see a good bit listed that I'd really have second thoughts about calling "critical".
For instance, even a CV joint I probably wouldn't call critical on a winch equipped vehicle, depending on where the journey is headed. How often on a typical overland trip do you actually
need 4WD? My consideration would be if I broke a CV, would I be able to winch past the 4WD needed parts to get back to a place where I can get one shipped to me? I've broken down in places a long way from home before, and just used the time to explore locally until I get the part. Obviously the amount of time you have is a factor as well.
Starter and alternator I'd probably just take the parts I'd expect to fail, bearings, diodes, brushes, bendix etc.
Not saying this is right for everyone, but it's the sort of thing I think about when balancing weight vs mobility. Of course certain things are "critical" like the crank position sensor.
Checking to see if I can edit my post