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Thread: Rather clueless about passenger car tires... quick size up question (lower motor RPM)

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    Rather clueless about passenger car tires... quick size up question (lower motor RPM)

    A normal tire size for me is 37-13.5-15, so it's safe to say I'm not familiar with passenger tires.

    Finally bought a Micra, and cant believe how horribly geared the car is. Its pulling 200rpm higher than my 3 cylinder Mirage in the highway, and fuel economy past 85km/h drops very sharply.

    Looking to reduce gear ratio by about 10-15%. I know roughly what size this tire will need to be, but I have no idea what a standard sized tire would be. Looking to keep as much sidewall as possible due to horrible local roads as well.

    Is a 205/65/16 a thing? Having trouble sorting out common, cheaper tires versus one off expensive ones.

    Took a peak under the car, and a tire about that size should clear just fine with a bit more offset rims.

    Also if anybody had ever rammed a 6speed into these or done a regear, that's also an option. I just cant understand why its pulling 3200 at 100.
    Last edited by nickels; 02-17-2019 at 09:11 AM.

        __________________________________________

        click to view fuel log View my fuel log 2018 Micra SV manual: 6.8 L/100 km ... 41.8 mpg (Imp) ... 14.8 km/L ... 34.8 mpg (US) ...


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