Sources

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INDYCAR Cuts Music City Grand Prix to 225 Laps as Heat Index Tops 100 Degrees

INDYCAR Reduces Music City Grand Prix to 225 Laps Due to Record Heat Forecast

Rain Postpones IndyCar's Nashville Race Until Monday

IndyCar race at Nashville shortened, postponed to Monday due to weather | RACER

Music City Grand Prix postponed due to rain. Here's when the race will begin in Nashville

Catchfence17d ago

Nashville Superspeedway INDYCAR Race Distance Reduced to 225 Laps Due to Record Heat Forecast - Catchfence

FOX Sports17d ago

Nashville Race Distance Reduced to 225 Laps Due to Record Heat Forecast | FOX Sports

Yahoo Sports17d ago

Rescheduled Music City Grand Prix shortened from 300 to 225 laps - Yahoo Sports