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Stock 15" Wheels to OEM 16"?

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Old 05-15-2007, 08:51 PM   #1
EvilBetty [OP] EvilBetty is online now
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Stock 15" Wheels to OEM 16"?

I have the 07 Access Cab (non prerunner) with stock 15" wheels and 70 series tires. I thought I'd be fine with that but they just look too small on the truck.

An option they offered me at the dealership was a 16" alloy wheel with 75 series tires.

This didn't make any since to me without changes to the transmission and PROMM. Anyone done this or know wha this would entail?
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Old 05-16-2007, 04:44 AM   #2
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You can purchase a small aftermarket controller that "recalibrates" your ECU to correct your odometer and automatic transmission when you go to larger wheels/tires. You can buy it for under $200.
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Old 05-16-2007, 09:49 AM   #3
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Interesting... Is it a permanant install or just used for a one time reprogram?
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Old 05-16-2007, 09:58 AM   #4
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Performance Products sells two different items. The first is SuperLift TruSpeed Signal Calibrator and the second is JET Accu-Speed. They hook inline between the transmission and the speedometer, so I would say that they are permanent as long as you have different size wheels/tires.
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Old 05-16-2007, 01:19 PM   #5
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Awesome, thanks for the info!
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Old 05-17-2007, 07:39 AM   #6
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When you upgrade to larger wheels/tires, you also need to keep in mind that you are changing the gearing/accelleration of your truck (differential area). You will theroetically get better milage, but at the expense of slower accelleration because of the taller gearing and greater wheel/tire weight. You also have to take into account that since your new wheels/tires also weight more, you have additional unsprung weight that your suspension has to handle. And last of all, depending on your new wheels/tires, how will this effect your ABS system too, since this is tied into the wheels/tires rotation.
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Old 05-17-2007, 07:50 AM   #7
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Yeah I thought about all of that, I think I need to call Toyota.

I don't know why they would offer those wheels / tires as an option if they didn't have a way to adjust all of that.
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Old 06-01-2007, 11:09 PM   #8
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any decent mechanic can adjust the gear ratio etc. to accomodate larger wheels/tires. toyota probably would have given the truck over to the mechanic to adjust for the new wheels/tires before you drove the truck off the lot...
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