Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_77317 ( "Position" real, "Driver / Passenger" text, "Equipment" text, "Bike No" real, "Points" real )

### Question ###
What is the most elevated Position that has a Points of 257, and a Bike No littler than 19?

### Accurate SQL ###

SELECT MAX("Position") FROM table_77317 WHERE "Points" = '257' AND "Bike No" < '19'