Race Tyre Choice ...Conti 4000S or Ultremo R1 ???

ralph_deefbone Posts: 2
edited March 2011 in Road buying advice
Just got a pair of Mavic Cosmic SLR's and not sure which tyre to use ? I've been using GP4000S for race tyres for the last couple of years ( dry weather riding ) Never had any issues with them, but a few friends reckon Ultremos are better ?? Any advice on this would be great ! Please note these will only be ridden in the summer in the dry