an optional upgrade, and must be paired with the Mod 1 93T Main Gear (TR503-093). The Mod 1 gearing delivers pilots extra piece of mind during thanks to it's increased strength when ...
the exact match with the original 177 tooth main gear (TR563-177) found in the Tron 5.5E. Offered in a wide variety of tooth counts to fit your needs for gearing and headspeeds ...