Yup your right....if you constantly tear spur gears off there is something wrong on Nitro's it's most likely the driver or way the rc's being driven thats causing it. Post some pics of the torn up gear and maybe even pics with the gear on the st so we can see whats up. Hope you realise alot of people here own Evaders and will try and help you out...don't be so fast to blame duratrax yet.