![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 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/H0c21e2028cad42d5879e21e01d0aba90t/Continental-Grand-Prix-4000-S-II-GP4000RS-GP4000S-Folding-Tire-700x23c-700-25C-Road-Bike-Tire.jpg)
Continental Tire Grand Prix | Continental Grand Prix 4000 | 700x23c Grand Prix Tire - Bicycle Tires - Aliexpress
![Continental Grand Prix 4000 S II (700c, Folding) - Wheel & Sprocket | One of America's Best Bike Shops Continental Grand Prix 4000 S II (700c, Folding) - Wheel & Sprocket | One of America's Best Bike Shops](https://www.sefiles.net/images/library/large/continental-grand-prix-4000-s-ii-700c-folding-202136-11.jpg)
Continental Grand Prix 4000 S II (700c, Folding) - Wheel & Sprocket | One of America's Best Bike Shops
![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
EuroBikeParts: Set of 2 Continental Grand Prix 4000 S II Tires GP 4000S 700 X 23 Road, Discontinued Unavailable, CONTI-GP4000sII
![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)