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speedo

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  1. 7

    14 Ram 2500 - adjusting the speedo for 35" tires

    So I have Alpha ODB and I made one adjustment trying to get my speedo more accurate. I am running 35x12.50R/17 which replaced the stock L285-60R/20E wheels/tires. My speedo always ran 2 - 4 mph faster after the change (meaning when the speedo said 70 I was actually going 66). So with the Alpha...
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