CREATE TABLE table_31572 ("Place" FLOAT, "Rider" CLOB, "Country" CLOB, "Machine" CLOB, "Speed" CLOB, "Time" CLOB, "Points" FLOAT)

Which rider had a speed of 90.57mph?
SELECT "Rider" FROM table_31572 WHERE "Speed" = '90.57mph'
SELECT "Rider" FROM "table_31572" WHERE "Speed" = '90.57mph'