RWB = Rear Weight Bias. Major components are shifted rearward to alter the bias and reduce weight on the front tires while increasing weight on the rear tires. Factory Team is proud to announce the RC8B4 FT RWB Chassis, which began development ahead of the 2022 IFMAR World Championships and saw race winning results with Spencer Rivkin at the 2023 TNR Challenge and Brent Thielke at the 2023 Dirt Nitro Challenge, along with A-Main performances from other team drivers during this time. Features