Database: bike_racing
Question: What are the names of distinct racing bikes that are purchased by the cyclists with better results than '4:21.558' ?
SQL:
SELECT DISTINCT T3.product_name FROM cyclist AS T1 JOIN cyclists_own_bikes AS T2 ON T1.id  =  T2.cyclist_id JOIN bike AS T3 ON T2.bike_id  =  T3.id WHERE T1.result  <  '4:21.558'