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Take a look at my post on general discussion / tires... Switching to 205 has more contact patch compared to 185.. it should give slightly better handling and better stopping power (obviously depending on the type of tire)... Mostly though, no difference would be notice for the avg driver... also... The actual speed will vary slightly.. but no difference will be notice by avg driver as well... As long as all tires are of the same size and make no suspension problem will occur...

Also... Tire pressure should be the same...use recommended.. you can tweak it to your liking of course.. but use recommended as baseline

Hope that helps...
 

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I would need to look into when wider tires becomes unsafe on our stock rims but........ On that link i posted... It shows the recommend alternatives to our stock tires. 205 is one of the recommended... I believe the difference is like 0.6%... don't quote me... but it was something negligible....
 
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