When a car has 14" front brakes and 15" rear brakes, what does that mean?
by 
shankar swaminathan
ANSWERS: 3
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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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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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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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