I ride 8 inch trucks and prefer equal sized deck but currently have two setups, one is with 7.875 deck and the other is 8.125, both feel fine, coz it is not such a big difference. I think the wheels matter, i am on classic shapes (f4 and loohole), but have have put 2 speedrings on the inside of the 8.125 setup so more or less i made the sizes equal.