hello all,im a major sledhead and finally picked up a summer sport,i just bought a new raptor 700r,i have a couple quick questions if anybody could help out...

1-is there an aftermarket larger gastank?i saw a pic on this forum of one for the 660 but is the 700 the same?if so where would i get one.
2-how does everyone find the stock tires?for coarse gravel sand and some mud what is a good upgrade?

i wont be doing anything with the exhaust or air intake,would rather keep stock for that..thnx