My current chain, DID, has 11000 miles of use. I noticed the other day that it has developed flat spots. Is it time to replace it ? I got 17000 miles with the OEM one. Can you use a chain with flat spots? And what is a flat spot? Thanks
Guessing you are referring to points in the chain where the slack changes. Areas where the slack is greater indicates where the pins are worn causing extra movement between pin and roller (elongating the chain). The side plates do not stretch as such. Where the slack is smaller are areas where there is less wear. I replace when the difference between the slackest and tightest spot is much than around about 10-15mm or the chain can be pulled of the rear sprocket by more than 3mm or so.
