![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? : 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? :](https://preview.redd.it/my6xmpzttsq41.jpg?width=640&crop=smart&auto=webp&s=d07053f183687fe5f700b2c726780866a3d6d10c)
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 GP 4000s II Folding Road Tire 700x25c Black Grand Prix GP4000 S II (SET OF TWO TIRES) - Walmart.com Continental GP 4000s II Folding Road Tire 700x25c Black Grand Prix GP4000 S II (SET OF TWO TIRES) - Walmart.com](https://i5.walmartimages.com/asr/af135992-83af-4d14-bbe3-867d12ada417_1.086be5b646587685306f0aaf9a084beb.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)
Continental GP 4000s II Folding Road Tire 700x25c Black Grand Prix GP4000 S II (SET OF TWO TIRES) - Walmart.com
![Amazon.com : Continental GP 4000S II Bike Tire, Black, 28-Inch x 22mm : Bike Tires : Sports & Outdoors Amazon.com : Continental GP 4000S II Bike Tire, Black, 28-Inch x 22mm : Bike Tires : Sports & Outdoors](https://m.media-amazon.com/images/I/81e-c761hyL._AC_SL1500_.jpg)