The Yokomo ZC-A3660B is a purpose-made aluminum spacer set for RC applications, replacing stacks of thin washers with single thicker pieces to increase mechanical strength and improve positional accuracy under load.
The set includes three nominal thicknesses: 4mm, 5mm and 6mm, with 8 pieces provided for each size. These spacers are suitable for fine, repeatable adjustments to gearmesh, suspension pickup spacing and axle or hub offsets on 1/10 touring and drift platforms. Installation is a direct swap for stacked shims or multiple thin washers at the same mounting points.
When adjusting, select the spacer thickness that gives the required clearance or preload, and re-check alignment after tightening to avoid unintended preload change. As aluminum parts, these spacers give improved rigidity and consistent fit compared with paper or multiple thin metal shims.
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