Re: Avon storm's - grooves wrong way?
Go by the direction arrows. I know the theory with car tyres is that the apex of the "V" faces rearwards - if it faced forward the water would be 'squeezed' toward the centre of the tread, causing a film of water to collect in the centre, promoting aquaplaning.
If you look at bike tyres, there isn't a symmetrical "V" pattern. I think that's because the centre patch area is a lot smaller on bike tyres.
One of my mates at work was convinced that the tread pattern was the wrong way around and insisted to the tyre fitter that he fit them the other way. After discussions with various bikers at work he started doubting his logic and emailed the tyre manufacturer. They told him to follow the direction arrow, so he ended up having t go back and have them refitted.
I don't recall if the response had much technical info as to why they are designed that way, but I remember they said they were tested as pairs (front and rear) and the interaction between them was optimised. If I remember I'll see if he still has that response.
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