CREATE TABLE table_203_873 (id NUMBER, "model name" CLOB, "length" CLOB, "width" CLOB, "height" CLOB, "riders" NUMBER, "capacity" NUMBER, "description" CLOB, "portable" CLOB, "notes" NUMBER)

which model was the tallest ?
SELECT "model name" FROM table_203_873 WHERE "height" = (SELECT MAX("height") FROM table_203_873)
SELECT "model name" FROM "table_203_873" WHERE "height" = (SELECT MAX("height") FROM "table_203_873")