UM Dallara iR01

The Dallara iR-01's brake system centers around dual master cylinder adjustment, allowing precise control over brake pressure distribution between front and rear axles. Brake bias is displayed as a percentage on the dash and represents the proportion of braking force sent to the front wheels—values above 50% shift bias forward, while lower values increase rear braking. The car features dedicated wheel lock indicators on both sides of the display that illuminate when a tire is sliding in the braking zone, providing instant visual feedback to help you identify the threshold of grip.

Brake setup requires balancing master cylinder sizes with your bias preference and track characteristics. Larger master cylinders reduce line pressure and create a softer pedal feel, while smaller cylinders increase pressure for a more aggressive, responsive feel. This interplay between cylinder sizing and bias adjustment lets you fine-tune not just the front-rear balance, but also the pedal's progressiveness and feedback.

The IR-01's lightweight construction (600kg dry) and 900bhp V10 create significant deceleration forces, making brake stability critical. Camber settings directly impact braking performance—higher negative camber improves cornering grip but reduces longitudinal braking traction. Pay attention to how brake bias affects tire temperature and wear patterns, as uneven heating between axles signals imbalance. Adjust bias throughout a stint as fuel burns off and weight distribution shifts rearward, requiring slightly more rear brake pressure to maintain optimal balance.