The Serpent 500504 4-Gear Laydown Transmission Kit is a practical upgrade for Spyder SRX2 1/10 2WD buggy owners seeking better traction and control. Its design shifts mass forward and lower, resulting in more stable handling on high-grip surfaces like clay, carpet and astro.
Compared with a 3-gear system, the 4-gear layout delivers a softer acceleration curve that is easier to manage through tight bends and technical sections. The transmission cases include inserts to set differential height at high, center or low to match track conditions.
The kit ships with a precision 7075 T6 motor plate to secure the motor to the chassis and case. An aluminium chassis upgrade is required for fitting, and parts are included when the SRX2 MM is used as the donor car. Full assembly guidance is provided in the online PDF manual.
For hobbyists focused on consistent lap times and gentler throttle control on grippy tracks, this transmission kit provides useful tuning options to adapt to various driving styles.
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