You done good on matching up the sizes of the rims and tires, buldges and heights.
The 255 / 30 / 19 on the front is 25.1 tall and has a 10.2 section on a 9" rim
The 305 / 25 / 20 on the front is 26.2 tall and has a 12.1 section on a 11" rim
Perfect.
What I am concerned about is your front backspace. With our DSE frame projects, we use a 6.2" BS on a 10" wheel, so to maintain your proper front space, you are going to need a 5.2" BS on a 9" wheel
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Frank Serafine
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