Ok since no one is responding i will just say it doesn't matter anyways watch this
http://www.youtube.com/watch?v=TLTWwFSgHMU and you shall see why , and in case you dont want to watch i can just tell you i killed my spur gear and rigged it for direct drive , i will get a video of it with direct drive now , it is much much faster , i knew it would be i just wanted to get a bigger motor and make it faster with the gear