
I fitted some XCR All Terrain tyres last summer after reading a review. I was very impressed with the overall performance but felt that they were not that durable and didn't last that long. I spoke to Michelin directly and they told me that they are releasing a new version of these tyres in 2006. The XCR version has a 127 tpi casing which means it is very thin and light for optimal performance. Their new XC range has a slightly thicker 60tpi casing making it more durable but only weighs in at around 30g-40g heavier and the retail price is about half that of the XCR version. Otherwise the tyre is identical. A friend has switched to these from the XCR and hasn't noticed any dramatical difference in performance but the tyre visually has less cuts and damage and looks like it will go on for ever!