I believe Cisco's terminology is Basic (minimum) supported data rate. 1, 2, 5.5, and 11mbps are the 802.11b standard for CCK modlulation.
These correspond to Ruckus 'bss-minrate' and 'mgmt-tx-rate', although they are not mutually exclusive.
Ruckus Default bss-minrate settings will reply to 2mbps client packets, with 2mbps responses.
You should not need to make any changes or adjustments.