Ensure smooth and reliable drivetrain performance with the TKRBB13194 13x19x4mm ball bearings (4). These high-precision bearings reduce friction, improve efficiency, and enhance durability for your RC vehicle. Compatible with Tekno RC models including ET48, EB48, and SCT410 series, they provide a secure fit for optimal power transfer and long-lasting operation. Upgrade your RC car with these bearings to maintain smooth rotation, consistent performance, and reliable handling on every track or off-road course.