I have 2010 Suzuki Alto ( front wheel drive ), Recently I noticed that front wheels get hotter unusually. Just a 5km drive makes lug nuts really hot. A mechanic checked the calipers & everything related to brake system. He did greased the caliper pins and other parts & make sure everything works fine. Also found out that the handbrake was not releasing all the way so replaced the cables as well. I did replaced the brake pads 4 - 5 months ago.

Then the mechanic told me that sometime aftermarket brake pads can cause excessive heat as well.

Since it didn't solve my issue, I went to another mechanic. He did drove the car & checked everything, told me that there's nothing to worry. However he resurfaced the brake disks as it was not smooth. This made brakes much effective than previous but my problem remained same.

Today I noticed that one side is getting hotter than the other one.

When I try to rotate the wheel by hand, It was little bit tight than the other one. Also I notice that half of the spin get little bit more tight than other half.

What the mechanic have done so far,

  1. Clean and greased the caliper pins.
  2. Ensure that the pistons/ calipers works fine & brake applied well.
  3. Resurfaced the disks as the surface was not smooth.

What I have done today,

  1. Lifted up & spined the both wheel on 1st gear which is where only one wheel spined
  2. I noticed that the inner side of the rim got too much dark dust from the brake pads ?
  3. I also tried to lift only the wheel that get hotter & spin that wheel only. I heard no noise & it did spined without any issue.
  4. I pressed the brake a bit while both wheels are lifted & running on 1st gear. The break on the spinning wheel causes to start rotating the other wheel but heard some kind of a sound of scraping two hard metal from the wheel that get hotter.
  5. Checked if I can hear any noise or feel wobble wheels while driving. Everything seems to be fine.

What should I do next ?

  • Welcome to Motor Vehicle Maintenance & Repair! Commented Nov 22, 2022 at 13:11
  • keep in mind a temp difference can be accounted by your route, if one side of the car has been in the direct sun and not the other. Commented Nov 24, 2022 at 7:12

1 Answer 1


If you've talked to two mechanics and both basically said the same thing, I'd suggest you're probably worrying over nothing. You state one side is hotter than the other, but you didn't say by how much. How did you verify one side is hotter than the other?

Remember, the way brakes work is through friction. With friction comes heat. The stopping energy of braking through friction has to be converted to something and dissipated, which is the heat you are feeling. The front brakes do 60+% of the braking action (between front/back), which also means they'll be hotter than the back. You're not hearing any noise or feeling any wobble, so mechanically it sounds like all is intact there. If it isn't pulling to one side or the other, then that is working as designed as well.

As far as the brake dust, it sounds like you have metallic pads on your vehicle. A much better option is to use ceramic, which leaves much less noticeable dust on the wheels. They usually work just a tad better than metallic pads do, too, so there's that as well. The only downside I've ever noticed with ceramic pads is, the first time they get really heated up during use, they tend to noticeably smoke, which is a bit disconcerting. Once that first thorough heat and cooldown is done, they don't do that anymore, but the first time you see it can cause worry.

  • Thanks for the answer. I touched the lug nuts. I felt the noticeable heat difference in two wheels. I didn't had any professional tools to measure the heat though.
    – Dilshan
    Commented Nov 22, 2022 at 13:17
  • Also I did compared the heat with another vehicle by hand. Mine is much higher than the other vehicle.
    – Dilshan
    Commented Nov 22, 2022 at 13:20
  • @Dilshan - The wheels are going to get hot. A lot of the heat from the brakes transfers into it and then gets dissipated. There's no two ways around that. It is hard to compare two different cars, because you have no way to tell if either has done a lot more serious braking before the heat is felt. Also, if you can put your hand (fingers) on the lug nuts, I'd suggest they aren't truly "hot" yet. If you can keep your hands several inches away and you're feeling the heat radiating (and it's uncomfortable), then there might be something to worry about. Commented Nov 22, 2022 at 13:39
  • That's how found out about the issue in first place. I was walking near the wheel & felt the heat.
    – Dilshan
    Commented Nov 22, 2022 at 14:26
  • 2
    @Dilshan who was driving the other vehicle you checked? Do you drive on the brakes? IOW do you keep your speed as high a possible for as long a possible and leave braking until the last possible moment? If the nearside wheel gets hotter than the offside wheel, it could be because of the road camber putting more weight on that wheel. Commented Nov 22, 2022 at 18:56

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