The Serpent 802170 19T Mid-Center Aluminum Pulley and Shim provides a precise, lightweight option for the Serpent 720-09 200mm GP. Machined from aluminium and treated with an anodised finish, this pulley balances low mass with improved surface hardness to help withstand track contaminants and wear.
Anodising creates a tougher surface layer that resists scratches and corrosion better than untreated metal. For model drivers this reduces routine upkeep and helps belts last longer. The finish also makes it harder for mud, grass and fine particles to adhere, keeping the drive system cleaner during runs.
This pulley and shim fit the original mid-centre arrangement of the 720-09, giving the classic chassis a reliability boost without altering its driving character. It is a practical swap for owners wanting durable, modern hardware.
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