Arrowmax AM-601021 21T Ultra Pinion for Modul1 Spring Steel  [AM-601021]

High-Strength Arrowmax AM-601021 Ultra Pinion

The Arrowmax AM-601021 Ultra Pinion 21T Modul1 is built for hobbyists who need steady, repeatable gear engagement. Its spring steel construction helps the gear stand up to prolonged use while keeping a precise tooth profile.

Why Spring Steel Works Well

Spring steel gives a mix of resilience and controlled flexibility that preserves gear integrity under impact and load. That makes it a sensible material choice for competitive or rough-surface running.

How It Fits Modul1 Gearboxes

Specifically matched to Modul1 spacing, the 21-tooth option provides a versatile gearing point for balancing acceleration and top speed. It installs cleanly on standard pinion shafts used in many RC cars.