A humming or roaring noise that rises with speed usually comes from one of two things: uneven tyre wear or a worn wheel bearing. The good news is they're easy to tell apart with a couple of simple tests, and if it's the tyre, fixing the underlying cause solves both the noise and the wear. Either way, it's worth checking rather than living with.
Tyre wear vs wheel bearing
The simplest test is to gently steer left and right at a steady speed on a quiet road. If the noise changes noticeably as you load one side or the other, a wheel bearing on the loaded side is the usual suspect. Tyre noise tends to change with the road surface rather than with steering. If in doubt, have both checked.
What uneven wear sounds like
Tyres worn in a "cupped" (scalloped) or "feathered" pattern make a droning, roaring hum that grows with speed. You can often feel feathering by running a hand across the tread, see why tyres wear unevenly. This kind of wear is a clear sign something needs attention, because the tyre is being worn in a way that also affects grip.
Why the tyre is wearing that way
Cupped or feathered wear usually points back to alignment, balancing or worn suspension; the RAC lists uneven tyre wear as a classic symptom of wheels that are out of alignment (source). That's why replacing the noisy tyre alone isn't enough; the new one will wear, and hum, the same way unless the cause is fixed. Sorting the alignment or balance and then fitting a fresh tyre is what cures it for good.
Could it just be the tyre type?
Sometimes the noise is simply the tyre's design. Chunky all-terrain tyres and some performance tyres are naturally louder than quiet touring tyres. If the noise was there from new and the tread is even, it may just be the tyre, in which case a quieter touring tyre next time will help, see quietest tyres.
Other noises and what they usually mean
Not every road noise is a tyre or a bearing, and the character of the sound narrows it down quickly. A hum, a rhythmic thump and a whine each point somewhere different. Use this table as a first pass before anyone starts replacing parts.
| What you hear | Most likely cause | Quick test |
|---|---|---|
| Steady drone that rises with road speed | Cupped or feathered tyre wear, or a wheel bearing | Does it change when you steer gently left and right? |
| Rhythmic thump, once per wheel revolution | Flat spot, a bulge, or a tyre out of round | Look and feel round the whole tread for a lump or a flat patch |
| Hum that appeared after new tyres | Tyre design, or the new tyre is directional and fitted backwards | Check the rotation arrows on the sidewall |
| Whine that changes with engine speed, not road speed | Drivetrain or an accessory belt, not tyres | Dip the clutch briefly: if the noise stays, it is road related |
| Grinding or a metallic scrape when braking | Brakes, not tyres | Does it change with brake pedal pressure? |
| Roar that got louder over months | Alignment wearing the tyre unevenly | Run a hand across the tread and feel for a saw-tooth edge |
Two more that catch people out: under-inflated tyres run louder as well as hotter, and a mismatched tyre on one side of an axle can make a car sound as though something is wrong when it is simply two different tread patterns.
Tests you can do yourself
Ten minutes on a quiet road and a walk round the car will usually tell you whether the noise is a tyre before you pay anyone. None of these need tools.
- Check the pressures cold. A soft tyre drones. Set all four to the placard figure and drive again.
- Clutch test. On a quiet, straight road, briefly dip the clutch (or select neutral for a second or two) at a steady speed, then re-engage: if the noise is unchanged, it is coming from the wheels or road, not the engine or gearbox.
- Steer test. Gently weave within your lane. A bearing on the left often gets louder steering right, when the load transfers onto it. Cupped tyre noise tends to change less predictably.
- Hand test. With the car parked and the wheels turned, run your palm across the tread both ways. A feathered tyre feels smooth one way and sharp the other. Cupping feels like scallops round the tyre.
- Swap test. Move the front wheels to the back, or left to right, if the tyres are not directional. If the noise moves, it is a tyre. If it stays put, look at the hub.
- Look at the inner edges. Alignment wear often hides on the inside shoulder where you cannot see it without turning the wheel to full lock.
If a wheel is noticeably hotter than the others after a drive, or there is play when you grip the tyre at twelve and six o'clock and rock it, treat it as a bearing and get it checked promptly, because a bearing can fail completely.
Can a noisy tyre be fixed without replacing it?
Sometimes, if the wear is mild and the cause is corrected early. A lightly feathered tyre that is rotated to another position and then run on a properly aligned car will often quieten as the tread wears back to an even profile. Correct pressures and a wheel balance help too.
What does not recover is a tyre that is heavily cupped, where the scallops are deep enough to feel with a fingertip. The rubber is gone and the noise stays until the tyre is replaced. Replace it and leave the cause untouched, and the new tyre will follow the same path.
The sequence that works:
- Fix the cause first: alignment, a worn damper or a tired suspension bush.
- Balance all four wheels.
- Rotate mildly worn tyres; replace badly worn ones, in pairs across the axle.
Noise itself is not an MOT item, but the uneven wear behind it can be: a tyre worn below 1.6mm anywhere in the central three-quarters of the tread, which heavy inner-shoulder wear can reach, or one showing cord, is an MOT failure and a legal defect, with fines of up to £2,500 and 3 penalty points per illegal tyre; the 1.6mm limit itself is set out on GOV.UK.
Choosing a quieter replacement
When it is time to replace the tyre, the EU label tells you how loud it is before you buy. The label carries a noise figure in decibels and a sound-wave symbol, and a few dB is a noticeable difference in the cabin. Alongside it are the A to E grades for wet grip and rolling resistance, and we would still put wet grip first for UK roads, see the EU tyre label explained.
Beyond the label:
- Touring tyres are generally the quietest; ultra-high-performance and all-terrain patterns are the loudest.
- Acoustic foam tyres have a layer of foam bonded inside the tyre to damp cavity resonance, and many EVs come on them.
- Tyre width and profile matter: a wider, lower-profile tyre usually transmits more road noise.
- Match the pair. Fitting one quiet tyre beside one loud one halves the benefit and can unsettle the car in the wet.
Whatever you choose, have the alignment checked when the new tyres go on, otherwise you are paying to wear a quiet tyre into a noisy one.
We can diagnose it
We can inspect your tyres for uneven wear, check balance and advise whether the noise is the tyre or something else, then replace tyres at your home or work in London and the Home Counties, and further out when the diary allows.
