New Robinson Racing Pinion Gear 48P Alum Silencer Pinion, 22T

The "Pro" Pinions are precision machined from aircraft aluminum, lightened and then they're coated twice with a super hard, black anodize. Recommended for onroad, but they can be run off road. Pinions are stamped with tooth number. 1/8 inch bore. One 5-40 set screw included.