![Continental Tubular Road Tires Grand Prix 4000 S Ii 22c Road Bike Clincher Folding Allround Road Bike Tire Tubular Tire 700c - Bicycle Tires - AliExpress Continental Tubular Road Tires Grand Prix 4000 S Ii 22c Road Bike Clincher Folding Allround Road Bike Tire Tubular Tire 700c - Bicycle Tires - AliExpress](https://ae01.alicdn.com/kf/H25286631d5854de5a46e28429275dbb4H/Continental-Tubular-Road-Tires-Grand-Prix-4000-S-ii-22C-Road-Bike-Clincher-Folding-allround-Road.jpg_Q90.jpg_.webp)
Continental Tubular Road Tires Grand Prix 4000 S Ii 22c Road Bike Clincher Folding Allround Road Bike Tire Tubular Tire 700c - Bicycle Tires - AliExpress
![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 4000 S II Tire 700x25 Black Folding Bead and Black Chili Rubber - Retro City Cycles Continental Grand Prix 4000 S II Tire 700x25 Black Folding Bead and Black Chili Rubber - Retro City Cycles](https://cdn.shoplightspeed.com/shops/617129/files/34779965/1652x1652x2/continental-grand-prix-4000-s-ii-tire-700x25-black.jpg)