5mm Mod 1 Pinion Gears - SPEED GEARS RATED TO 100 MPH!

5mm MOD 0.6 Pinion Gears - SPEED GEARS RATED TO 100 MPH!

5mm 32P Pinion Gears - SPEED GEARS RATED TO 100 MPH!

JK Products 48P Plastic Pinion Gear (3.17mm Bore)

Yokomo Hardened Steel 48P Pinion Gear (3.17mm Bore)

Robinson Racing Steel 48P Pinion Gear (3.17mm Bore)

AM Arrowmax "SL" Molded Composite 48P Pinion Gear (3.17mm Bore)

Team Associated Factory Team Aluminum 48P Pinion Gear (3.17mm Bore)