I've had all three of those tyres on the rear and the RR grips best out of the three tyres. The Ikon is the best lasting out of the three and a bit loose on anything gravelly at high speeds. Forget the continental, if you have 19mm internal rims the side walls flex like hell on the corners and they are a real hard and brittle rubber that the knobs break off on. Also kept on burping air on the hard hits.
Rather than throw the tyre away, I used it on the front of my dirtjumper with 32mm internals plus tubes and it flexes a whole lot less but over all a very shit tyre in my opinion.
One week old Continental X-King MTB Tyre - ProTection
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