Last week was the release of the 2017 season 2 build. This brought a lot of changes, among others the tire model of many road cars. As expected some things need some tweaking or fixing. That’s why iRacing released a patch today.

The biggest updated to the tire model is increasing the tire wear over a long run.
Read the release notes below.

Release notes

Simulation
- Fixed the iRacing installer program to correctly refer to the 64-bit iRacingService64.exe, instead of the 32-bit version that no longer exists.
- Fixed an issue where if the iRacing installation directory name contained spaces, the iRacingService might not start properly.

Controls
- Fixed a bug where the updated fast releasing parking assist brake aid was not releasing as it should.

Tires
- Reduced the ability of tires to pick up and retain debris to make accumulation of dust and marbles reasonable with soft and sticky tires.

Visual Effects
- Heat haze distortion effect has been updated.

Particles
- Opponent cars’ particles should now roll better.
- Opponent cars will now emit less smoke when on wet surfaces.
- Adjusted dust cloud generation and scale.
- Smoke particles should now appear more prevalent on tires.

PopcornFX
- Fixed an issue where multiple fireworks playing in the same frame were not emitting multiple sounds.

Replay
- Fixed a bug that was preventing the Results page on the Replay screen from populating with the results from all the weekend’s sessions when watching a replay that was loaded off disk.

Virtual Reality
- Fixed an issue where the new VR headset sound rotation option could not be turned back on using the in-sim UI.
- Fixed panning sound issues with replay cameras and virtual reality headsets.

CARS

Aston Martin DBR9 GT1
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

Audi R8 LMS GT3
- Baseline setups have been corrected.
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

BMW Z4 GT3
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

Cadillac CTS-V Racecar
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

Chevrolet Corvette C6.R GT1
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

Chevrolet Corvette C7 Daytona Prototype
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

Dallara DW12
- Season setups have been updated.

Ford GT
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

Ford GT GT3
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

Ford Mustang FR500S
- Slightly increased cure-based tire degradation.

Global Mazda MX-5 Cup
- Season setups have been updated.
- Slightly updated tire construction and compound.
- Slightly increased cure-based tire degradation.

HPD ARX-01c
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.
- Tire compound has been hardened for greater responsiveness and lower yaw at which we see peak grip.
- Fixed an issue where the tires would appear to protrude through the fenders.

Kia Optima
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

Mazda MX-5 Cup & Roadster circa 2015
- Slightly increased cure-based tire degradation.

McLaren MP4-12C GT3
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

Mercedes-AMG GT3
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

NASCAR Sprint Cup Chevrolet SS
- Fixed a bad license texture that was causing corruption on the front splitter and rear spoiler.

Pontiac Solstice
- Slightly increased cure-based tire degradation.

Porsche 911 GT3 Cup Car (991)
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

Pro Mazda
- This vehicle has been converted to use PBR shaders.
- Default wheel color has been changed.

Riley MkXX Daytona Prototype
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

Ruf RT 12R C-Spec
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

Ruf RT 12R Track
- Season setups have been updated.
- Greater tire degradation over long runs via cure-based degradation.
- Minimum cold tire pressures have been increased to ensure realistic operating pressures.

VW Jetta TDI Cup
- Slightly increased cure-based tire degradation.