[brushlessboy16]

Originally Posted by lincpimp

Also keep in mind the pinion spins much more than the spur does. So even if the material on both was identical the pinion would wear faster. Say you run 13/46 gearing, the pinion rotates 3.5 times more than the spur. So hardened pinon needs to be many times harder than the spur to survive...

very true linc, but that was after only 20 minutes of running