Table: islemantt_results_2
Columns: rank
rider
team
speed
time

Question: Which Rider finished with a speed of 81.91mph?
SQL: SELECT "rider" FROM islemantt_results_2 WHERE "speed" = '81.91mph'

Question: Which Rider finished with a speed of 80.18mph?
SQL: SELECT "rider" FROM islemantt_results_2 WHERE "speed" = '80.18mph'