Fitting the Serpent SER401943 Solid Axle BB Set is a popular route to more consistent handling on the Medius X20 '21 MID 1/10 EP. The 38T design helps eliminate erratic diff reactions and delivers smoother throttle application out of turns.
The 38T axle fits Medius X20 models including SER400037 and SER400038 and suits drivers wanting a predictable rear end under power. It is a straightforward upgrade for drivers prioritising corner exit stability over full differential advantage.
Ensure correct alignment with the existing drivetrain when installing the solid axle. Regularly check driveshaft interfaces and bearings, and replace worn parts promptly to maintain performance.
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