AKA Mule. You can carry an additional 50 lbs. of equipment for each level of this Perk.— in-game description, Fallout

Strong Back is a perk in Fallout, Fallout 2, Fallout 3, Fallout: New Vegas, Fallout 4, Fallout 76, Fallout Tactics, Van Buren, J.E. Sawyer's Fallout Role-Playing Game and Lionheart.

Fallout, Fallout 2, Fallout Tactics and J.E. Sawyer's Fallout Role-Playing GameEdit

With each level of this perk, you can carry an additional 50 lbs. of equipment.

Fallout 3 and Fallout: New VegasEdit

With this perk, you can carry an additional 50 lbs. of equipment.


  • This perk also stacks with Burden to Bear.
  • With this perk and 10 Strength, you can carry up to 300 lbs. before becoming overencumbered.
  • In Fallout: New Vegas with the add-on Honest Hearts, this perk allows you to bring 100 lbs. of equipment with you through a dialog check with Jed Masterson.
  • In Fallout: New Vegas with the add-on Lonesome Road, when combined with a Strength of 10, Burden to Bear, the NCR Courier duster and the Hoarder trait, you can achieve a carrying weight of 400 pounds.

Fallout 4Edit


Rank Requirements Description Base ID
1 STR 6 What are you, part pack mule? Gain +25 to carry weight 0004b24e
2 STR 6, LVL 10 You now have +50 to carry weight. 00065e5b
3 STR 6, LVL 20 When overencumbered, you can use Action Points to run. 00065e5c
4 STR 6, LVL 30 (Normal Mode) When overencumbered, you can fast travel.

(Survival Mode) When overencumbered, you will not become injured.

5 STR 6, LVL 40 Gametitle-FO4 FH When overencumbered, running costs 50% less action points. xx0423a3


  • With rank 3 of this perk, running while overencumbered consumes AP similarly to sprinting. Because of this, increased Endurance also lowers the AP drain just like it would for sprinting.
  • Rank 3 of the Moving Target perk also takes effect with the ability granted by rank 3 of this perk, reducing the AP drain of running while overencumbered. It also combines with rank 5 of this perk multiplicatively, further reducing (but not negating) the AP drain.
  • On Survival Mode, Rank 4 will negate damage taken from being overencumbered.
  • Rank 5 requires the Far Harbor add-on.

Fallout 76Edit

What are you, part pack mule?


Rank Description Base ID
1 You Gain +10 Carry Capacity ????????
2 You Gain +20 Carry Capacity ????????
3 You Gain +30 Carry Capacity ????????
4 You Gain +40 Carry Capacity ????????


Gametitle-LHThe following is based on Lionheart and is not part of the Fallout franchise.

With each level of this perk, you can carry an additional 50 lbs. of equipment.

Gametitle-LHEnd of information based on Lionheart.