4 Stroke Sand tire recommendations

Hey guys I have a '13 350 exc-f that I'm looking to take to the dunes in a few weeks. Wondering what size I show go with and how many paddles?

Stock rear tire is a 140 I believe. Will a 110 8 paddle be fine?
 
Do the number of scoops just make a difference for getting traction?

I might go with an 8 just because they are a lot cheaper and it will be used for one trip a year to st anthony idaho
 
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