This spur gear is as beefy as they get, and has held up to 550 brushless on 4s, though that's at the limit of what the single friction Axial slipper clutch can take. Just be sure to get Robinson's matching "super hard/ absolute" steel pinion... I didn't notice initially that I had bought a regular steel pinion and destroyed it (the pinion) in less than 1 pack. Also, be aware that these are a lot n
