TWI mark on Pirelli tyre: What is it?

[Horney1]

Hi,


I was looking at my tyres yesterday and saw a few little bulges across the tyre tread at one point (below the contact surface of the tread in the troughs actually). Initially I thought it might be damage from when I hit a small kangaroo but then I noticed a the letters T.W.I. on the sidewall near the tread.

Does anyone know what TWI stands for? Is it a Tyre Weld point or something? Tyres are Pirelli Scorpion AT V-rated.


Cheers

C

[tl_tub]

Tread Wear Indicator. The story goes that when these are level with the surface of the tyre you should replace it (assuming even wear side-middle-side)

[Horney1]

Tread Wear Indicator. The story goes that when these are level with the surface of the tyre you should replace it (assuming even wear side-middle-side)

Cheers for that TL. I thought it must be something logical like that.

There's a pic at
http://i153.photobucket.com/albums/s...1/DSCF1735.jpg
if anyone want to see what these wear indicators look like.