I purchased my blaster used with no motor and it came with some 18" tires that are like new so I want to use them. I know that I need to run a new chain and sprockets becouse of the fact its a new used motor I just need some help picking the size of the front and rear sprocket. I plan on running this blasty mostly on trails with a few long straights and alot of turns and woops (I hope that is the term) and jumps. I also want to learn to wheelie becouse it just looks fun! There will be a few bigger quads out there so I would like to spank them in these tight trails if I could loose them in the turns they may not catch me in the straights. What are you guys running for these type of conditions with the little tires?