Post
by Witchfinder » Tue Aug 10, 2010 4:14 pm
The minimum tread depth is, IIRC, 1.6mm. Tyre manufacturers and other organisations recommend you change at 2.0mm, but then again that's like Kellogg's recommending you buy a new packet of cornflakes when your old one is down to 20% full.
When you say "1.4 legal tread left," do you mean it's 1.4mm above the legal limit? If so, then you have about 3.0mm left which sounds reasonably healthy. If it's down to 1.4mm, then I thought that would be an MOT failure, as it's already below 1.6mm.
Also, you need to take into account the wear pattern across the whole of the tyre - is it more worn on one particular part of the tyre?
Tyres generally have wear markers that indicate when you should change. These are ridges inside the tread grooves. When your tyre is worn down to the top of the ridge, you should definitely change! You can also get a little tread depth meter from most motor spares shops, which is well worth the investment. They're pretty cheap.
Cheers,
Rob
Rob Illing
Mondeo ST220 - Silver with Infrared Leather Recaros, DVD navigation and Xenons