This is the 11106th most frequent Russian word.
гонщиков
"Racers" or "drivers" (plural form).
Here, the word 'гонщиков' is in the genitive plural form, indicating possession of or association with multiple racers.
На трассе соревновались десятки гонщиков.
Dozens of racers competed on the track.
In this context, 'гонщикам' is the dative case plural form, used to denote 'to the racer(s)' or 'for the racer(s)'.
Тренер давал советы молодым гонщикам перед заездом.
The coach gave advice to young drivers before the race.
The word 'гонщики' is in the nominative plural case, describing multiple racers who are the subject of the sentence.