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by shankar swaminathan on February 14th, 2006

shankar swaminathan

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When a car has 14" front brakes and 15" rear brakes, what does that mean?

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Answers. 3 helpful answers below.

  • by 8 Jan 2004-10 Dec 2009 on November 18th, 2006

    8 Jan 2004-10 Dec 2009

    I would like more information. Are you sure you're reading it right? Is it actually the right manual? To me, 14-15" sounds more like a rim size than a brake rotor size. Does your car have 18+" rims?

    UPDATE - A little digging revealed that the 2006 Miata has 11.4" ventilated discs up front and 11" solids discs in the rear monted inside 16" or 17" rims. Older Miatas came with smaller rims and may have smaller brake rotors as a result.

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  • by 8 Jan 2004-10 Dec 2009 on February 28th, 2006

    8 Jan 2004-10 Dec 2009

    It tells me three things.

    1) The front brake rotors are 14" in diameter and the rear ones are 15".

    2) The rims on the car are quite huge; likely 18" or more. Rims are measured on the outside and the inside is a couple inches smaller. Add a little clearance space to keep the rims and rotors from meeting, and you get huge, pimpin' ricer rims.

    3) Either the person who installed the brakes is either:
    - A ) A rally racer, autocrosser, or other person who needs a strong rearward brake bias in order to induce oversteer and rotate the car, or...
    - B ) A moron. See above. Given the performance-robbing characteristics and lower durability of too-large rims, I am more inclined to believe this is the case.

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  • by sbryant6 on November 18th, 2006

    sbryant6

    yea, that should be the reference to the tire size. e.g.-P185/60-14 is the tire size for a Mazda Miata, the 14 refers to the diameter of the wheel in inches.

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More Questions. Additional questions in this category.

You're reading When a car has 14" front brakes and 15" rear brakes, what does that mean? - which can also be phrased in the following ways:

  • My car manual says I have 14" front brakes and 15" rear brakes. The diameter of my disc rotors is only about 9". What is manual referring to?

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