Why is my Honda Type R so noisy at slow speeds?

I have a 2002 Honda Civic Type R with 62k miles on the clock, which I have owned since new. Over the past year or so it has developed a rumbling thunder type noise when driving at low speeds. I recently changed the drop-links and the ARB bushes on the front and a local garage couldn't find anything wrong. Any ideas what it could be? My suspicion is that suspension bushes may be worn, but like I say the garage didn't think so. Any ideas?

Asked on 2 December 2016 by Graham Defries

Answered by Honest John
Probably the tyres. When low profile tyre get down to 2/3 to 3/4 worn, more surface area is in contact with the road and noise increases. Could also be wheel bearings, of course, but movement on the hubs can be felt when the car is up on a hoist.
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