The BA 2100, or Olympus,[3] was a conceptual inflatable space habitat[2] by Bigelow Aerospace.

The larger BA 2100 would extend the volume and capabilities of the B330 module, which is under development as part of the Bigelow Commercial Space Station.

[5] The mass of the BA 2100 could be as low as 65,000 to 70,000 kg (143,000 to 154,000 lb),[1][2] but would more likely be "in the range of 100 metric tons".

[6] It is substantially larger than the B330, with the docking ends of the module alone estimated at approximately 7.6 m (25 ft) in diameter.

Pressurized volume of single BA 2100 module is 2,250 m3 (79,000 cu ft),[3] compared to 1,005 m3 (35,500 cu ft) volume of the whole International Space Station as of November 2024[update].