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Tron Helicopters 5mm Mod 0.7 Pinion gears are 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 depending on equipment choice.
Gearing Charts:
13T: 13.62:1
14T: 12.64:1
15T: 11.80:1
16T: 11.06:1
17T: 10.41:1
This product was added to our catalog on June 4, 2021