Upgrade your Mini 4WD with Tamiya's 11mm HG Bowl Type Aluminum Ball-Race Rollers, engineered for speed, precision, and track-hugging stability.
These 11mm ball-race rollers help improve a Mini 4WD's chances of finishing a race by enhancing stability during runs. Their bowl-shaped design helps the car slide back down if it rides up onto a lane wall, assisting it in regaining the course. They can also be used as part of racing setups to support smoother, more controlled performance in tight lanes.