Brake rotor diameter

I'm looking to purchase new rotors. There are two different sizes I see on the rear rotors which are 10.31" and 11.89". Would they both fit?
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
According to the parts listings, the front rotors are the same size across the line. The choices are when it comes to rear brake rotors. The 10.31 inch rotors are for the 2 wheel drive models and the 11.89 inch rotors are for the all-wheel drive models. They are not interchangeable. You have to use the size specific to your vehicle. There can be significant differences in how the brakes are mounted between front and all-wheel drive models. There is an inch and a half difference in size so you must use the correct size for your vehicle.

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Replacement for 2008-2013 Dodge Avenger (11.57″ (294mm) Front Rotors; 10.31 inch (262mm) Rear Disc Rotors)
Notes: Rotor only, *302mm Rotor *Replace in pairs for best performance.
Disc brake rotors usually last so long that many people treat them as `fit and forget` components. However, manufacturers provide minimum thicknesses for their rotors. Shimano recommends that its rotors, which start out 1.8mm thick, should be replaced when the braking surface has been reduced to 1.5mm.
Call your local OEM dealer and ask for the original rotor sizes or OEM rotor/pads part numbers based on your vehicle`s VIN number (VIN# is referenced in your ownership papers). The dealership may not tell you the rotor size, but they will give you the genuine part numbers for your vehicle.
Rotor Diameter means the cross sectional dimension of the circle swept by the rotating blades of a wind-powered energy generator.
According to the parts listings, the front rotors are the same size across the line. The choices are when it comes to rear brake rotors. The 10.31 inch rotors are for the 2 wheel drive models and the 11.89 inch rotors are for the all-wheel drive models. They are not interchangeable.
When the time comes to replace your rotors, remember that not all rotors are made the same. In fact, there are four different types to choose from, so before replacing your vehicle`s rotors, make sure you`re selecting the right one for your needs.
In many cases, it`s about finding the balance between power, brake feel and weight. As a general rule, road and cyclocross rotors sit in the 140 to 160mm range, striking a balance between necessary braking power and low weight. Modern mountain bike brakes often come specced with rotors ranging from 180 to 220mm.
Simple physics dictate that yes, larger rotors provide more stopping power. The very basic premise is that, as you increase the size of the rotor, you increase the leverage acting on the wheel, thus it is easier to stop.
For aggressive enduro riders with large 29” wheels, 200 mm rotors are mandatory and upgrading to 220 mm rotors is worthwhile for heavier riders. Trail bikes also benefit from powerful brakes. Unless you`ve got powerful brakes such as SRAM CODEs or a four-piston Shimano model, we would always resort to 200 mm rotors.
Standard diameters – mm (in) :- 378 (14.88″), 362 (14.25″), 356 (14.0″), 343 (13.5″), 330 (13.0″), 325 (12.8″), 315 (12.4″), 304 (11.97″), 295 (11.6″), 280 (11.02″), 267 (10.51″), 254 (10.0″).
Increasing The Size Of Your Rotors Improves Heat Dissipation

The biggest benefit of increasing the size of your rotors is improved heat dissipation. When you use your brake rotors and pads hard (for example, at the track), they heat up faster. As a result, these parts will have a hard time cooling down.

In many cases, it`s about finding the balance between power, brake feel and weight. As a general rule, road and cyclocross rotors sit in the 140 to 160mm range, striking a balance between necessary braking power and low weight. Modern mountain bike brakes often come specced with rotors ranging from 180 to 220mm.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

When I put my foot on the brake my back left brake light goes off, when I take it off the brake the brake light comes on
ANSWER : I would suggest trying to disconnect and reconnect the wiring to the rear lights. I have seen these older Toyota vehicles rear lighting short out on the lights themselves due to the way the light circuit was made on the lamp housing. Look at the housing circuit on the light to see if one is touching another, and that could tell you why it is malfunctioning. There could also be a problem with the brake light switch. If you are not comfortable dealing with wires, I recommend getting in touch with a certified mechanic who can look at your brake light issue for you to see what’s going on.

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Low brake pedal and anti-lock brakes are not kicking in.
ANSWER : The brake pedal is working to stop the vehicle, but there may be air in the controller unit causing the ABS brakes to not function. I recommend bleeding the brake system from the farthest location from the master cylinder to the master cylinder including the ABS unit. If the brakes are still spongy after a full bleed, then the controller will need to be replaced. If you need further assistance with your brake pedal being spongy, then seek out a professional, such as one from Your Mechanic, to help you.

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Uneven brake rotor wear
ANSWER : Hello. I tried to view the pictures but the link seems to be broken. It sounds like you have two different problems reading the description of the problem. The first is the brake pads being too tight and binding in the caliper bracket. This is most likely caused from the pad ends are not machined smooth and do not slide into the caliper bracket smooth. This will cause them to bind and cause low brake application or will keep the brakes partly applied wearing them down quickly. The other possible problem is the caliper may be binding on the slides or the piston is binding. If you would like precise advise on exactly what needs repair, have a certified professional diagnose the brake system in person and follow through with correct repairs.

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EPC light on 2004 Jetta. Code said brake switch faulty, but brakes lights worked. Replaced brake switch, now no brake lights.
ANSWER : Hi there. The first thing that pops in my mind beyond of what you have listed is perhaps the electrical harness attached to the brake switch. Perhaps the harness itself is damaged or you have an exposed wire, loose ground wire somewhere. You might want to have a professional mobile mechanic come to your location and complete a brake lights not working inspection to help you diagnose this issue.

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Front steering/suspension shaking while braking
ANSWER : Hello. It is possible that you could have a control arm bushing that has failed. When a control arm bushing fails and the brakes are applied, the vehicle will display these exact same symptoms that you described. I would recommend enlisting the assistance of a qualified professional to inspect your steering and suspension parts for worn control arm bushings. If any excessive wear is found in the control arm bushings, I would recommend having them replaced as soon as possible because this can result in a safety issue. If you need help getting this taken care of, a certified professional can diagnose the suspension and brake system to verify the problem and move forward with appropriate repairs.

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Supportive bar attached to brake pedal interrupts proper braking process
ANSWER : It’s possible to have someone alter the brake pedal or adapt a brake pedal from a different vehicle. You may call around to some customization shops to see if anyone is interested in taking on the project. But first, I would try reaching out to the selling dealer with your concern – especially since it is a new model. Good luck.

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Brake rotor burned after brakes replacement
ANSWER : It sounds like the parking brake mechanism has failed and kept the brakes on in that wheel. I cannot say if the dealer should have found the problem at that time, since the problem may not have been there at the time they did the brake service for you.

If you feel they did not fix it correctly, then take it up with the manager to see what can be done to help pay for the repairs. The problem was not there before they touched the vehicle and now it is. Maybe something they did or didn’t do would require an investigation by an independent shop.

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Brake sensor is to sensitive causing brakes to flicker while driving. 2005 Mercury Montego
ANSWER : Hi there – your brake light switch needs a minor adjustment. It is adjusted too "tight" or close to the brake pedal lever, or possibly has failed. Adjusting/replacing it will eliminate this flickering problem. I recommend a brake light isn’t working inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

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