These are Traxxas 32 Pitch Hardened Steel Pinion Gears. These gears are used for various Traxxas models and feature 5mm Bore center hole, compatible with 5mm motor shafts.
Compatibility:
- Traxxas Hoss
- Traxxas Summit
Note: This list may not be 100% accurate or up to date, and is meant to be used as a guideline for compatibility.