Thread: tire and wheel advice

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being a 16 inch rim the closest tire size to the stock 185/55/15 would be the 185/50/16....it only has a 1.16% difference ....
Stock tire is....23.1 inches in diametre
new tire is......23.24 inches in diametre

with the back ....the closest tire size to the stock 205/50/15 would be the 195/45/16 .74% difference......OR...you go with the 195/50/16 2.54% difference
Basically.....seeing that the speedo is connected to the tranny......for speed.varience you go with the back tire calculation....... the front is simply to match the closest size.

Stock Tire.....23.07 inches in diametre.....speedo reads 60mph = 60mph
seeing that the speedomoter is connected to the tranny
195/45/16 tire.....22.90 inches in diametre......speedo reads 60mph = 59.5/mph actual speed
195/50/16 tire.....23.67 inches in diametre......speedo reads 60mph = 61.5/mph actual speed


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hope this helps......