In the sand your going to hook up a lot more so I say at least a +4 swinger. For carbs go at least 33 PWKs. Suspension ELKA Dune Edition With some +2+1 A-Arms Roll Design, Wicked, Fireball, Laegers Etc. For tires Skat-Trak Haulers or Extreme 10 Paddle your rim size is really preference I run the 20-10-10 cause i love how they slide and turn so well and still hook up great but I dune my bike 90% of the time so if you want to drag it then run a bigger tire.