![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?auto=webp&s=c195cabb75a5d54281bb1839d9095ed71c3a74be)
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? :
![Habersham Bicycles - ISS4492 Continental Grand Prix 4000S II Tire - 700 x 28, Clincher, Folding, Black/Reflective, 330tpi Habersham Bicycles - ISS4492 Continental Grand Prix 4000S II Tire - 700 x 28, Clincher, Folding, Black/Reflective, 330tpi](https://habershambicycles.com/images/product/large/ae00-3583.jpg)
Habersham Bicycles - ISS4492 Continental Grand Prix 4000S II Tire - 700 x 28, Clincher, Folding, Black/Reflective, 330tpi
![Continental Grand Prix 4000 S Ii Folding Tire 700x23c Road Bike Tire+freeshipping - Bicycle Tires - AliExpress Continental Grand Prix 4000 S Ii Folding Tire 700x23c Road Bike Tire+freeshipping - Bicycle Tires - AliExpress](https://ae01.alicdn.com/kf/Sb616fa783d1445a6b765f3fe0d77fc29o/Continental-Grand-Prix-4000-S-II-Folding-Tire-700x23c-Road-Bike-Tire-Freeshipping.jpg)