CREATE TABLE table_31857 ("Rider" TEXT, "Bike" TEXT, "Laps" FLOAT, "Time" TEXT, "Grid" FLOAT)

Which rider went 18 laps ending +25.165 behind the leader?
SELECT "Rider" FROM table_31857 WHERE "Laps" = '18' AND "Time" = '+25.165'
SELECT "Rider" FROM "table_31857" WHERE "Laps" = '18' AND "Time" = '+25.165'