Raikabula suffered an ankle strain during training yesterday. He was captaining the side in the absence of the injured DJ Forbes. Tomasi Cama takes over the captaincy duties.
Lahmert made his debut for the All Blacks Sevens at the Gold Coast Sevens last October and led the New Zealand Emerging Players side that took part in the recent Uprising Sevens tournament in Fiji. He is due to arrive in Las Vegas today.
The tournament, which is the fifth leg of the HSBC Sevens World Series, kicks off tomorrow NZ time.
Be sure to follow the All Blacks Sevens on twitter @nz7s