The Tamiya 42171 RC 620 HC Thrust Bearings provide a rebuildable option for ball differentials, making it easy to change the number of balls inside the assembly. This helps you balance wear resistance with rotational smoothness for longer drivetrain life.
The kit ships with two thrust washers and eight 1/16-inch balls. Adjust the configuration to suit aggressive off-road runs or casual track driving, and you'll find a setup that reduces wear while keeping operation smooth.
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