plus sizing tires?

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Old 01-04-10, 07:05 PM
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plus sizing tires?

I've got an 08 Toyota Highlander with 245/55/19 tires. The oem Bridgestone Duelers are absolutely awful. basically bald after 25k miles. So I just went on Tire Rack to try to find a replacement before getting into a wreck to find that that is the only tire they sell in that size! a bunch of research later and I find out that there are maybe three tire models in that size that are available, none of which I would choose happily.

Just wondering if I can go up one size to a 255/55/19 tire for which there are a lot more options. I know that will slightly increase the diameter of the tire which will lower my rpms, lower my speedo etc. by approximately 1.44%, Just wondering if this would potentially do any damage to the drivetrain of the vehicle?
 
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Old 01-04-10, 07:36 PM
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The 255 is the width of the tire in mm. The 55 is the percentage of the width that is the height, which, in your case would be 140.25mm high from the rim. Since your original height was 134.75, your rate of error would be about .96%. It could, maybe could, affect the computer, but I doubt it.
 
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Old 01-04-10, 08:31 PM
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Have you tried Michellin tires?

They wear very well but not sure if they're available in your size.
 
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Old 01-05-10, 03:56 AM
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Everything I've read, says stay under 3% difference and you should be o.k., just a little difference at speedo. Just take the time to get used to the feel and response of the wider tire, as you will probably find, that it will turn (respond) quicker when you turn the wheel, so highway driving may take a little getting used to, as you may have to pay a little more attention to slightly more wander if you take eyes of the road for a second, at least I found that with my vehicle, when I did same.
 
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Old 01-05-10, 04:38 AM
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I used to rebuild Triumph TR-6's, and wandered away from redline Michelin's to Bridgestone. Literally wandered. Tires would not keep a straight line, even at more sane speeds. Lesson learned, went back to Michelin's redlines. I did find that cross tread tires seemed to wander more than straight tread. Another good brand is Cooper. I've seen them built. Inside each tire is a tag that will take you back to the machine and person who built it. Excellent quality control from what I saw.
 
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