My bike has recently developed a crack on the seat tube. The bike is just over 5 years old and has been used for commuting an 8 mile round trip for 5 days per week for about 18 months, then was not used for about 18 months, then used for 3 days per week on a 8 mile daily trip.
This makes me wonder if bike frames have a limited lifespan and whether my bike's frame has cracked due to wear and tear?
Work colleagues do a similar or even longer journey than mine and some have done so for more than 5 years and their bike's are fine. I'm not overweight for my bike and if the crack was due to a manufacturing fault then I would have expected it to manifest itself within a few years or less.
Does wear and tear break frames?