I am setting up a TT quad and am curious about tires - What are the different compounds used for - softer for smoother tracks? Is there a tire thats good for all conditions? I'm just starting out so I would like to get a good all around tire. What size tires should I get?

Also on rims - I'm getting some hipers - I'm planning on getting 10 X 5 4:1 offset for the front but I'm not sure what size to get for the rear - either a 10X9 3:6 offset or a 10X10 4:6 offset - what would you recommend? or does it matter?

Thanks for helping a newbie out!