I got the Dynamics on the bike stock (offthepeg) and at first really good training tyre - get it in a bigger version than the 23mm I had and you could easily tour on it. THEN when it started to wear I got lots and lots of punctures. Still, I chaingang'd them and they're quite fast too, pretty ok grippy but could give a bit in the wet. They are really cheap BUT not a bad buy really for the price. ONTO the Oriums They're are soo similiar to the Dynamics that I wonder why Michelin made both or maybe one was to replace the other ???? I find the Oriums (which I'm currently riding) slightly more slippier than the Dynamics in the wet - in the dry; both, no worries. With the Oriums you can get them in various colours which feature on the -outer edges of the tyre, if thats for you I'd personally recommend the Oriums over the Dynamics as a training tyre, a general tyre - pretty good for most things really. I felt the Dynamics where a tourers type of tyre that could be ridden over massive distances...and hold up/perform really well.