The Tamiya 15395 JR Mini 4WD Hex Mount Set is built to let you change roller height quickly and reliably. With both 10mm and 15mm hex mounts included, you can tailor roller placement to suit different circuit profiles and reduce accidental derailments.
Whether you are refining a race setup or fine tuning a weekend build, these hex mounts let you test different roller arrangements. Small changes in height can make a noticeable difference in cornering and straight line stability.
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