"As we're only able to take 28 players on tour, to include Beauden we unfortunately have to leave one player behind and the logical choice was for a prop to miss out. In this case, it made sense to leave Wyatt Crockett at home as we can cover all our bases with the other four props," Hansen added.
Argentina competed well in Wellington, although the windy and wet conditions suited them, and they will be fired up to deliver a similar test at Estadio Ciudad de La Plata a week on Sunday (NZT).
The Springboks will also be desperate to prove themselves at Soccer City in Johannesburg after going closer than expected in the 21-11 All Blacks' victory in Dunedin last weekend.
Barrett had been put on standby for the trip due to Carter's injury which is why he didn't play for Taranaki in their defeat to Auckland at Eden Park on Wednesday.
All Blacks' squad to travel to Argentina and South Africa:
Forwards:
Hookers: Andrew Hore and Keven Mealamu. Props: Charlie Faumuina, Ben Franks, Owen Franks and Tony Woodcock. Locks: Brodie Retallick, Luke Romano and Samuel Whitelock. Loose forwards: Sam Cane, Richie McCaw (captain), Liam Messam, Kieran Read, Adam Thomson and Victor Vito.
Backs:
Halfbacks: Aaron Smith and Piri Weepu. First-fives: Beauden Barrett, Daniel Carter (vice-captain) and Aaron Cruden. Midfielders: Tamati Ellison, Ma'a Nonu and Conrad Smith. Outside backs: Israel Dagg, Hosea Gear, Cory Jane, Ben Smith and Julian Savea.