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Machined from white duracon material. This spiral main gear T117 is designed for JR SYE12. By combining with different pinion gears, you can choose from the following gear ratios: T9 = 13:1 T10 = 11.7:1 T11 = 10.6:1 T12 = 9.75:1 T13 = 9:1 Weight: JR T115 spiral main gear 62g VJP T117 Spiral main gear 63g JR T120 Spiral main gear 64.5g  | | ||||||||||||||
