![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 II Folding Road Tyre & Tube Twin Pack - Black - 700c x 23mm | ProBikeKit.com Continental Grand Prix 4000S II Folding Road Tyre & Tube Twin Pack - Black - 700c x 23mm | ProBikeKit.com](https://static.thcdn.com/images/small/original/productimg/960/960/11173765-3894329358910784.jpg)
Continental Grand Prix 4000S II Folding Road Tyre & Tube Twin Pack - Black - 700c x 23mm | ProBikeKit.com
![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? :
EuroBikeParts: Set of 2 Continental Grand Prix 4000 S II Tires GP 4000S 700 X 23 Road, Discontinued Unavailable, CONTI-GP4000sII
![Amazon.com : Continental Grand Prix 4000 S II Road Clincher, Black, 700 x 23-Inch : Bike Tires : Sports & Outdoors Amazon.com : Continental Grand Prix 4000 S II Road Clincher, Black, 700 x 23-Inch : Bike Tires : Sports & Outdoors](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/51ZRngaZodL._AC_UF1000,1000_QL80_.jpg)