need advice on tire ,wheel combo

i am ordering a big wheel combo from wild boar atv and i want the silverback 30x9x14 now the 14 inch rim doesn’t say how wide it is i want the m17 wheel i already have it in a 12 inch rim and it is 8 inches wide, do you think it will be the same and can i run 4 9inch skinnies on an 8 inch rim, my grizz is purely for mud i have an other bike for trails. now am i better off going with the 4 30x9x14
or th 20 30x9x14 and 2 30x11x14 kit. thanks

need advice on tire ,wheel combo

i am ordering a big wheel combo from wild boar atv and i want the silverback 30x9x14 now the 14 inch rim doesn’t say how wide it is i want the m17 wheel i already have it in a 12 inch rim and it is 8 inches wide, do you think it will be the same and can i run 4 9inch skinnies on an 8 inch rim, my grizz is purely for mud i have an other bike for trails. now am i better off going with the 4 30x9x14
or th 20 30x9x14 and 2 30x11x14 kit. thanks