Bought a set of 28c Continental Grand Prix 4000S II tyres exactly 1 year ago from Wiggle, they're already cracking. Is this normal, and how do I avoid this in the future? :
Continental GP4000 S2 tyre review - BikeRadar
![Continental Grand Prix 4000 S II 650c Road Tire [C1022223] at BikeTiresDirect](https://www.biketiresdirect.com/productimages/imageslarge/co2s62-1.jpg "Continental Grand Prix 4000 S II 650c Road Tire [C1022223] at BikeTiresDirect")
Continental Grand Prix 4000 S II 650c Road Tire [C1022223] at BikeTiresDirect
EuroBikeParts: Set of 2 Continental Grand Prix 4000 S II Tires GP 4000S 700 X 23 Road, Discontinued Unavailable, CONTI-GP4000sII
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