This is an optional RC4WD Yota Axle Helical Gear Set. Designed to run smoother and be stronger, this helical gear set is compatible with the Gelande kit, as well as the full line of RC4WD Yota axles. Features: CNC Machined Hardened Steel Gear Ratio: 12 / 32 = 2.67 : 1 (Same as Stock) Smoother and Quieter than Traditional Gears Fits all 1/10 Yota Axles