If the track stays wet, i would put the left rear on a 8 1/4" wheel to give you a little softer sidewall in that tire, which will give you a little more forward bite off the corner where you need it. I have ran the right sides on 9" wheels and left rear on 8 1/4" wheels alot when we go to wet tracks and have always been up front with that combo, because the taller/softer sidewall will give you more sidebite in the corners on a wet track like that, especially when you have the tires uncut, full rubber tires. If the track usually dries out some and doesnt stay wet, i would definitely be on 10" right sides and 8 1/4" left rear. If track dries up and has good bite, 10" right sides, 8 1/2" left rear. All our left fronts are on 6x6.5" wheels, i do keep 8 1/4" and 8 1/2" left rear wheels on hand for when i need to change stagger or need more forward bite off the corner. If the track is smart, they will leave the track packed after saturdays race and not dig it back up, then just water it on sunday before you guys race and roll it in, that should make for a decent bite track if you have 30-40+ karts running 5 or more classes. Keep in mind, running 33's, you will need to be prepping them just about every time you go out if you plan on being competitive. If there is no tire rule, i would be on SS11's or SS22's instead of SS33's since you do not want to cut or prep the tires at all. Make sure your kart is set up with low cross and low left percentages and lower right front camber if you dont plan on prepping tires, that will help get you some bite out of the chassis and get the tires into the track a little more in my opinion. Keep your air pressure very low when the track is wet, i would start out with 2lb on all 4 corners or 3lb on all 4 corners, and as the track gains bite, raise the air about 1/4 or 1/2lb in each tire. I usually start on 3lb all the way around for wet tracks and as the track gets bite, i will go up 1/2lb in all 4 tires and usually will increase the air pressure split from the same on all 4 corners to putting 1/2lb more in the right side tires than i put in the left side tires, if that makes sense. On a good bite track, i use a 1lb split from the left side to the right side tires. Lower air will give you more bite and keep you planted on the track more so you arent sliding around