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Speedocalibration and tire clearance
Okay I'm like pretty new to the powerstroke forum so if these both have been covered my apologies I can't figure out how to "search" using the TapTalk app... anyways I bought a 2012 F-250 recently it already has a H&S single tune on the truck well I want to throw a set of 37 mud grapplers on the truck but I want my speedo to be pretty accurate. I saw somewhere somebody saying you can't use the Hypertech speedo calibrator with a tune. My truck is tuned and deleted by previous owner. I also have a question about tire clearance I want to jump from the stock 275/65r20s to a 37x13.50r20 mud grappler I have a 2.5" lift but I'm more concerned about clearance on my radius arms. I'm going to be running the stock 20" lariat wheels and I want to know other than buying a new set of wheels with offset what my next option would be??
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