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What is the diameter of the Elantra brake disc?

2 Answers

Leroy

09/02/25 3:37am

The diameter of the Elantra brake disc is 275mm. Simply put, a brake disc is a round disc. The advantages of disc brakes are as follows: 1. Disc brakes have better heat dissipation than drum brakes, preventing brake fade and failure during continuous braking; 2. The thermal expansion of the brake disc in the thickness direction is minimal, so heating does not increase the brake pedal travel; 3. Disc brake systems respond quickly, allowing high-frequency braking, which better meets the requirements of ABS systems; 4. Disc brakes do not have the friction-boosting effect of drum brakes, ensuring more balanced braking force between the left and right wheels; 5. The superior drainage of brake discs reduces the risk of poor braking due to water or mud; 6. Compared to drum brakes, disc brakes have a simpler structure, making it easier to achieve automatic clearance adjustment and facilitating maintenance.

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Myra

09/14/25 5:53am

As an owner who has driven the Elantra for three years, my 2019 1.5L Automatic Premium model has measured brake disc data as follows: front disc diameter 280mm, rear disc diameter 262mm. These dimensions are considered medium-level among vehicles in the same class, sufficient for daily city commuting. However, last year when driving on mountain roads, I noticed the brakes felt slightly soft after continuous downhill driving. It wasn't until consulting with a modification shop that I learned heat dissipation is more related to disc surface design. Now during every maintenance session, I have the mechanic specifically check disc surface wear and thickness. After all, with a fixed diameter, if the thickness falls below 20% of the standard value, replacement is necessary. I recommend fellow car owners to refer to their vehicle's maintenance manual to confirm specific parameters, as there might be a few millimeters difference between different model years. By the way, when replacing brake discs, it's best to have the brake pads checked simultaneously, which can save a lot on labor costs.

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