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  #11  
Old 08-03-2012, 08:39 AM
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Gantman Gantman is offline
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Yeah BlackHemi, you should recalibrate to get the speedo, wheel speed sensors and transmission shifts all working together. Your stock 275/60-20's are 32.99" in diameter where as your 275/55-20's are at 31.9" in diameter. If your going 65mph on stock, your new smaller diameter tires are really only pushing you to 62mph.
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Old 08-03-2012, 09:38 AM
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no wonder why everyone passes me on the highway lol!
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