Disappointed by the Performance of the 2.0T BMW 430i (2021)- Track Review

About the Ruisi Circuit: The Ruisi Circuit is a 1.3-kilometer racetrack located in Beijing, China, known for its emphasis on curves.
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About Vehicle Modification and Wear: To ensure the authenticity and objectivity of our channel, most of the test vehicles are provided by our audiences. Consequently, some cars undergo significant modifications, improving lap times, while others might have severe tire wear or be too old, impacting their performance. We disclose these details in the video.
About the Levels of Modification: We classified 4 levels for mods.
- Level 0: Includes factory-standard cars and those with only tire, brake, and "mood" part replacements. As many older cars have discontinued tires and rare brake pads, we allow minor tire upgrades. For example, upgrading from original tires to PS4 for a Civic or from PSS to CUP2C for an M2C is acceptable. However, upgrading a Civic to CUP2C tires counts as a modification.
- Level 1: Light modifications, including tires, wheels, suspension, brakes, intake/exhaust systems, and ECU. Modifications to the engine and gearbox internal structure are not allowed, nor are R-Comp tires. This category is the most common for entry-level modified cars.
- Level 2: Moderate modifications, such as internal engine forging, larger turbos, cylinder expansion, or transplanting non-performance engines. Transmission system modifications, like LSD + larger final drives, are permitted. Thermal-melt tires are allowed.
- Level 3: Race-level modifications. There are no restrictions here. This includes professional race cars, performance engine transplants, sequential gearboxes, and altered suspension structures.
- Level -1: Typically refers to using tires of lower specifications than the original factory standard, such as on an A45, or carrying a passenger (additional weight).

[@postalpancho]

Sorry about your poor experience with the BMW. It has to be the tires that completely ruined your experience. Switch those awful Bridgestones to some Michelin Pilot 4S tires and the car completely transformed. I won fastest at PAX twice with my G42 BMW. Then the last two races of the season I replaced my rear tires with some Firestone firehawk 500 and came in 15th place.
Not having the right tires is a big problem. Wish you could have experienced the car with a proper set of tires.

[@KeyboardRacerCult]

Thank you for your comment and for sharing your experience. Indeed, the tires on the test 430i significantly affected track performance. To maintain the authenticity and objectivity of our channel, most of our test vehicles are provided by our audience. This means we occasionally encounter vehicles that aren't in perfect condition. I completely agree with you that switching to better tires, like the PS4S, could dramatically improve the BMW 430i's performance on the track, potentially shaving off more than 2-3 seconds.
We "keyboard racer cult," also known as the "tire racer cult," pays close attention to this aspect. Our leaderboard also features many cars with high-end tires. If you're interested, please subscribe for more insights.
Once again, thank you for your valuable input; please feel free to let us know if you have some other suggestions!