Bushing adapter piece. Pack of 4 units.
With this new solution it is possible, very economically, to use any article with a Ø 2.38 mm base (rims, axles, crowns, stoppers, etc... ) and use them in any model that, as standard, only equips ball bearings for axle of Ø 3 mm (BRM, Revo Slot, TTS, etc.).
IMPORTANT: Always lubricate the bearings.