1998 CART season Drivers and constructors Drivers and constructors

| Team | Chassis | Engine | Tires | No_ | Drivers_ |
|---|---|---|---|---|---|
| Hogan Racing | Reynard 98i | Mercedes | Firestone | 9 | JJ Lehto |
| Della Penna Motorsports | Swift 009.c | Ford XB | Firestone | 10 | Richie Hearn |
| Della Penna Motorsports | Swift 009.c | Ford XB | Firestone | 43 | Hideshi Matsuda |
| Project Indy | Reynard 97i | Ford XB | Goodyear | 15 | Roberto Moreno ,  Domenico Schiattarella |
| Bettenhausen Racing | Reynard 98i | Mercedes | Goodyear | 16 | Hélio Castroneves |
| PacWest Racing Group | Reynard 98i | Mercedes | Firestone | 17 | Maurício Gugelmin |
| PacWest Racing Group | Reynard 98i | Mercedes | Firestone | 18 | Mark Blundell |
| Payton/Coyne Racing | Reynard 98i | Ford XB | Firestone | 19 | Michel Jourdain, Jr. |
| Payton/Coyne Racing | Reynard 98i | Ford XB | Firestone | 34 | Dennis Vitolo ,  Gualter Salles |
| Patrick Racing | Reynard 98i | Ford XB | Firestone | 20 | Scott Pruett |