The Racing Ralph's supple, light Evolution carcass with low, broad triple-compound tread is still outstandingly fast and responsive. Also, unlike many superlights, it really is the size it says it is, which adds big float and comfort.
The tread hooks up consistently in far worse conditions than you'd expect it to. It's smooth into corners with an easily controlled slide if base grip is exceeded, and it's predictable over roots and rocks. The fast-cleaning tread means you can even leave it on the rear all through winter if you don't mind getting tail happy occasionally.
The downside - apart from the price - is that the fat, exposed carcass is vulnerable to damage and the soft tread elements wear very quickly.