Tyres - 1 set for winter, 1 set for summer

Hi everyone
I've got a set of Schwalbe Ultremo ZX Tyres which are great, but they're 700 x 23 and I'm not sure how they'll cope with the icy roads during the winter, so I'm thinking of switching them to 25mm winter tyres till next spring.
Will storing my current tyres for 6 months degrade them?
What tyres would be good for winter?
Thanks loads for any help
I've got a set of Schwalbe Ultremo ZX Tyres which are great, but they're 700 x 23 and I'm not sure how they'll cope with the icy roads during the winter, so I'm thinking of switching them to 25mm winter tyres till next spring.
Will storing my current tyres for 6 months degrade them?
What tyres would be good for winter?
Thanks loads for any help

0
Posts
25mm Conti 4 Seasons; pretty good winter tyre
But don't expect to go ice skating just because it's slightly wider
Schwalbe Marathon Winter and similar are fine for icy conditions - but you won't fit them between the stays of a road bike......
I've had tyres on my bike for more than a year before but that's while I was using them. My question is really around whether I can leave them off the bike till next spring. Will the rubber perish/deform/go hard?
The other part of the question was around winter tyres. I've cycled through central London for 5+ years each winter and the roads there almost never get properly icy. I'm now cycling near Neathrow and there's less traffic which results in the roads staying icy. I know that road bikes don't really cope all that well with these kind of conditions, but I don't want to give up cycling for the winter (and I don't have a mountain bike), so I'm just trying to get the best tyres available to deal with a slight amount of ice during the harshest bit of the winter.
Thanks Keef66 - I think I might get some of the 25mm ones of these:
http://www.chainreactioncycles.com/Mode ... elID=18794
Cheers
Jibb
2 tyres and tubes for £64