![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? :
![Continental Grand Prix 4000S II Reflex Clincher Road Tyre Twin Pack with 2 Free Inner Tubes - Black - 700C x 25mm | ProBikeKit.com Continental Grand Prix 4000S II Reflex Clincher Road Tyre Twin Pack with 2 Free Inner Tubes - Black - 700C x 25mm | ProBikeKit.com](https://static.thcdn.com/images/large/original/productimg/0/960/960/91/10995991-1410872677-701027.jpg)
Continental Grand Prix 4000S II Reflex Clincher Road Tyre Twin Pack with 2 Free Inner Tubes - Black - 700C x 25mm | ProBikeKit.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_UF1000,1000_QL80_.jpg)
Amazon.com : Continental GP 4000S II Bike Tire, Black, 28-Inch x 22mm : Bike Tires : Sports & Outdoors
![Continental Tire Grand Prix | Continental Grand Prix 4000 | 700x23c Grand Prix Tire - Bicycle Tires - Aliexpress Continental Tire Grand Prix | Continental Grand Prix 4000 | 700x23c Grand Prix Tire - Bicycle Tires - Aliexpress](https://ae01.alicdn.com/kf/H0465f22db7a644edb9f2c28108404b019/Continental-Grand-Prix-4000-S-II-GP4000RS-GP4000S-Folding-Tire-700x23c-700-25C-Road-Bike-Tire.jpg)