Gehard stalen tandwielen passend in alle FG differentieelen, behalve Viscose differentieel 8603 en 8604. Buitendiameter van 28,7 mm, asgat is 5,0 mm, hoogte 7,6 mm, 16 tanden.
Hardened steel gears fit all FG diferentials, except the vViscose differential 8603 and 8604. Outside diameter is 28,7 mm, axle hole is 5,0 mm, 7,6 mm high, 16 teeth.