How long should a Chain last? I have a trek 8.3 bought it in January. I am 57 years old and a newbie so it's not like I have ridden thousands of miles on it and in fact took a 2 month hiatus due to health. At any rate I got a group on for a local LBS and he called me today and said he replaced the chain. Now my concern isn't with his honesty but I feel a chain shouldn't stretch that fast. Are chains on new bikes inferior compared to after markets? Thought's ?? Thanks