I put new belts a little more than a year ago and have run about 15t miles on them.
Today I replaced the lower radiator hose sending unit O-ring and looking around the engine bay I noticed the AC belt is showing cracking at the grooves. The other drive belt is just fine.
Any reason why the AC belt would be wearing faster?
Both are Continental belts purchased new that were installed at the same time.
EDIT: pic -
