TKR4188 "M5" Hardened Steel Mod1 Pinion Gear w/5mm Bore (28T)

Improve drivetrain durability and performance with the Tekno RC TKR4188 “M5” Hardened Steel Mod1 Pinion Gear (28T), precision CNC‑machined from hardened steel for strength under high‑load racing and bashing conditions. The lightweight design reduces rotating mass for efficient power transfer and quieter operation, while the oversized M5 set screw ensures a secure, slip‑resistant grip on the motor shaft. Featuring a 5 mm bore and standard MOD1 pitch, this pinion gear is compatible with a wide range of 1/8 scale vehicles that use MOD1 5 mm pinions, including popular Tekno platforms such as the EB48 series (EB48, EB48.2, EB48.3, EB48SL), ET48 series (ET48, ET48.3), and SCT410 series (SCT410, SCT410.3). Laser‑etched tooth markings make it easy to identify gear size and change ratios quickly when tuning for speed and acceleration.