These are optional HPI 0.6 MOD E10 Pinion Gears for the HPI E10 Drifter. A lower tooth count on the pinion gear will give you more acceleration, while a higher tooth count will give you extra top speed. Have a selection of pinion gears available so you can tune the speed of your car as desired!
NOTE: Not compatible with 48 and 64 pitch spur gears.
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![HPI-88022 HPI Pinion Gear 22Tooth (0.6M) [88022] HPI](http://ultimatehobbies.com.au/cdn/shop/files/HPI-88022.jpg?v=1758062599&width=500)