what causes my spur to be swiggly?

[primus95]

My spurs always warped on my Rustler VXL. To limit this happening, and to help longevity of gear life, switch to 32pitch / 0.8 pitch gearing. Spur from the Jato, and Pinion from the E-Maxx. That will definately help. The 42pitch gearing is way too small in my opinion for the power output of the VXL engines on lipo. Hope that helps.