Compact size, uncompromising durability. The FONZON All-Metal Differential is purpose-built for the ARRMA GROM series, delivering robust power transfer in a lightweight, mini-scale package. Designed with high-strength materials and precision assembly, it’s the ultimate upgrade for durability and smooth drivetrain operation.

Compact size, uncompromising durability. The FONZON All-Metal Differential is purpose-built for the ARRMA GROM series, delivering robust power transfer in a lightweight, mini-scale package. Designed with high-strength materials and precision assembly, it’s the ultimate upgrade for durability and smooth drivetrain operation.