As a clyde tires are an important item...really no matter what your size. When i bought my bike at the end of the 09 season i put some new tires on it and choose continnetial GP 4000....at the begining of the season i noticed what appeard to be dry rot cracks just where the tread meets the sidewall. these tires had less than 300 miles on them at that point and the nipples were still on the front tire. I was somewhat worried and took the tire off and looked on the inside and it looked good. Getting the bike ready this season and it looked worse and there are strands of what appear to be reenforcement shreading off the tire. I contacted continential last year and got no response....going to trash these tires i think .They other than this issue they have given me no issues and i really like them but am possibly gun shy on the brand especially at $140+ per pair not counting tubes. What to do? Anyone else have issues with their Conti's? Any one want to rec. a good 700x23?