I have had a pair of these on my XC bike for about a year now and they perform brilliantly. They are very fast rolling and they provide excellent grip on medium to dry trails and the corner knobs allow the bike to be leaned right over into fast corners without sliding out. Although the tyres are a fairly soft compound they still last a decent amount of time on the road too so there are no worries of them wearing down too quickly if commuting to trails over a long distance. Their low weight ensures that they accelerate quickly and make climbing a breeze. There are only 2 downsides I can see with these tyres. First is the cost (although if you want quality they're not a lot more than the competition). Second is that I have found they puncture fairly easily if run at lower pressures due to their thin composition, although this is only a minor niggle. If you want a good XC racing tyre then buy them!
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