![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 Grand Prix 4000s II Cycling Tire, Black, 700 x 25C : Amazon.com.au: Sports, Fitness & Outdoors Continental Grand Prix 4000s II Cycling Tire, Black, 700 x 25C : Amazon.com.au: Sports, Fitness & Outdoors](https://m.media-amazon.com/images/I/51ZRngaZodL._AC_UF1000,1000_QL80_.jpg)
Continental Grand Prix 4000s II Cycling Tire, Black, 700 x 25C : Amazon.com.au: Sports, Fitness & Outdoors
![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_UF1000,1000_QL80_.jpg)
Amazon.com : Continental GP 4000S II Bike Tire, Black, 28-Inch x 22mm : Bike Tires : Sports & Outdoors
![Continental Grand Prix 4000s Tires Clincher user reviews : 4.1 out of 5 - 102 reviews - roadbikereview.com Continental Grand Prix 4000s Tires Clincher user reviews : 4.1 out of 5 - 102 reviews - roadbikereview.com](https://content.roadbikereview.com/channels/roadbikereview/images/products/large/product_411202_29676.jpg)
Continental Grand Prix 4000s Tires Clincher user reviews : 4.1 out of 5 - 102 reviews - roadbikereview.com
![ยางนอกขอบพับเสือหมอบ Continental Grand Prix 4000 S II,700x23C - 888bike | MTB | Road | TRI | Citybike : Inspired by LnwShop.com ยางนอกขอบพับเสือหมอบ Continental Grand Prix 4000 S II,700x23C - 888bike | MTB | Road | TRI | Citybike : Inspired by LnwShop.com](https://inwfile.com/s-f/l1rhfm.jpg)