The NTT IndyCar Series is exploring a transition from magnesium to aluminum wheels for the 2026 or 2027 season, driven by increasing scarcity of magnesium casting capabilities for racing wheels.

Currently, teams use specialized magnesium 'aero' wheels with a distinctive front lip design that helps manage airflow. These wheels, primarily supplied by O.Z. Racing, are becoming harder to source and often face age-related corrosion issues.

The proposed aluminum wheels would maintain identical dimensions to the current magnesium versions, with manufacturers aiming to achieve comparable weight specifications. A key benefit of the switch would be reduced costs, with potential savings of $750 or more per set.

Current magnesium wheel pricing:

• Individual wheel (front or rear): $1,650
• Complete set: $6,600

Teams typically maintain 10-12 sets (40-48 wheels) per car for each full-time entry, with replacements needed throughout the season due to crash damage. O.Z. Racing is in discussions with IndyCar about manufacturing the aluminum alternatives.

The final specifications for the aluminum wheels are still being determined, with weight matching and cost reduction being primary considerations for the series and teams.

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