Why are tyre grooves not evenly spaced?

[okohll]

Noticed that the grooves in the stock MG4 tyres are not evenly spaced. They vary between 2 and 3cm with no particular pattern.

This seems to be common, see also images

https://www.2ndhandtyresales.com.au/wp-content/uploads/2019/08/5ABD3F79-E118-4C2E-B4F6-76511B5564BE.jpeg

https://i5.walmartimages.com/asr/5e947d0d-0575-4213-8a00-ec3c4230c5fb.2ac36524296a1f9df0d9a211190c16c9.jpeg

https://www.bridgestone.com/products/basic_knowledge/trivia/images/img_WhyDoTiresHaveGroovesOnThem.jpg

but there doesn't seem to be any well know reason

 

[decrep]

Does that only happen at one spot, or is it random around the whole tyre?

If it's only one spot, then the grooves aren't divided equally around the circumference but are a default distance apart, so the start finish spot, will be shorter.

 

[Superflan]

I've heard it was for noise reduction. it makes sense that if you space them apart equally, a tyre drone could happen at fixed speeds.

 

[okohll]

Does that only happen at one spot, or is it random around the whole tyre?

If it's only one spot, then the grooves aren't divided equally around the circumference but are a default distance apart, so the start finish spot, will be shorter.

Random

I've heard it was for noise reduction. it makes sense that if you space them apart equally, a tyre drone could happen at fixed speeds.

Ah, that could be it!

Well what do you know, that is confirmed by



around 8 minutes in.

Started watching that after @Ian Key posted some videos about batteries from the channel in another thread