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Wheels & Tires Semi-Tech General discussion of wheels and tires for the Ford Ranger.
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Old 02-09-2010
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Need advice.

I want slightly bigger tires. Without compromising the speedometer. I have : 235/75/15 with stock suspension and 3.55 ratio. I would like maybe some 32's - 33's but no idea if it would mess up my speedo and fuel economy. Any info would be appriciated.
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Old 02-09-2010
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31's are your best bet cause u probably don't want to lift.. IIRC you have the new keys which make the take sit a little lower so I don't even think you can crank the bars and fit 32's.
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Old 02-09-2010
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Any change in tire size will throw your speedo off. It will read about 10% low if you go with the 31" tires. You can correct it in the PCM. I did the same thing, and it doesn't drop the fuel economy much, maybe .5 mpg to 1 mpg. I don't know about those 3.55 gears turning 31" ties though. Somebody here might know better than me.
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Old 02-09-2010
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look into the prekey mod.. its fairly cheap.. and you should gain about 1.5 - 2" in the front... and you should easily be able to fit 32s...
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Old 02-11-2010
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I went form 245 to 265. just remember the faster your going the more the needle is off, i painted my gauge cluster just after getting new tires. i left the speedo needle off and went out and did 60 down the highway (according to the GPS). i pushed the needle on at the speed the GPS read so that when i'm on the highway the needle will read vary close to my actual speed. Or you could just have it re calibrated. As for fuel economy it's just about the same as before, I'm running 4.10's
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Old 02-11-2010
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32x11.5x15 is the best combo stock it looks wonderful. personally 31's are still a little to small, yes and look into getting pre keys to make your ride height correct
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