For valid, no-nonsense improvements to rotation, the Tamiya 42369 - 840 Sealed Ball Bearings are a sensible upgrade. The rubber seals provide protection while still allowing routine servicing to retain performance.
The 840 size appears in pulley assemblies and counter gear areas on many TA07 and M-chassis models. Installing these sealed bearings can reduce friction and improve the feel of rotating components.
These bearings are supplied with low-friction oil and feature rubber seals that can be opened for cleaning and relubrication. Regular simple maintenance helps keep them operating smoothly for longer.
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