It's your vehicles way of telling you to change your pads. If the grinding noise is present when you use the brakes, the pad is almost gone. If the noise is present after the brake has been released you're getting close to damaging the rotor and you need to put pads in asap.
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It could be brakes, bearings or something else altogether.
Depends on the kind of grinding. The brakes may have been messed with, so you'll getting a constant grinding noise. If the noise is audible when you first turn the vehicle on and it not in motion, then you have other problems. If you only hear it while the vehicle is in motion, then you should take it back to the shop where you got your tires replaced.
Brakes could be bad, or wheel bearings too, des happen when u apply th brakes or just when is rolling? either way answer is probably around the tires
if u put wider aftermarket tires on then the tires are rubbing on the fender wheel well if you are refering to in/at the actual steering wheel, then some grinding noise is normal. it's possible the electrical contacts for airbag/cruise/radio controls, whatever you have on the steering wheel are making some grinding noise.
bad rotors
When motorcycle brakes lock, they make a light grinding sound accompanied by the loud screeching of the tires. When the brakes lock, the tires are forced to slide along the pavement until the brakes are released on the bike stops.
I'd try changing tires, worked for me.
Check tires -I did check the tires, cleaned off the drum brakes, checked the shocks, everything is in order but the noise continues to get louder-
take a look at your front rotors if the are not smooth then they need to be changed also check if they are warped that will be a little tricky if you dont know how. best bet is if you havent changed brakes in a while you should go ahead and do it. as far as the turning have your wheel bearings looked at and your tires if the bearing have failed they will cause a squeak or grind and if your tires are too big or out of round that will cause a vibration
it could be your power steering pump. check your fluid level, then also check to see your not leaking any fluid.
new tires. If the tires brake, you'll need it