I have these a grade up on a race triple. Haven't punctured in 22 months constant use. http://www.wiggle.co.uk/ProductDetail.aspx?Cat=cycle&ProdID=5360030000&N=Continental%20Grand%20Prix%204000S%20Tyre But for race only these: ttp://www.chainreactioncycles.com/Models.aspx?ModelID=24535
@50/14 started
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I have these a grade up on a race triple. Haven't punctured in 22 months constant use.
http://www.wiggle.co.uk/ProductDetail.aspx?Cat=cycle&ProdID=5360030000&N=Continental%20Grand%20Prix%204000S%20Tyre
But for race only these:
ttp://www.chainreactioncycles.com/Models.aspx?ModelID=24535