How long does an aluminium frame lasts in a touring bike?
[Removed extra questions to be clear.]
So far I preferred aluminium vs. steel for many reasons, but if steel lasts significantly longer, for my next touring bike I will go for steel.
My Cannondale Badboy 2004 has a crack in the alu-frame. I was surprised by this, I thought my bike will last 20+ years easily. The workshop they said this is a high quality, strong frame, but after 10 years alu frames can get tired. Especially if I use my bike both in winter and summer, as the heat change wear alu faster. They say it can be welded, which will cost significantly less vs. a new frame (if it is available), but I should be prepared for other cracks to appear. The workshop contracts a welder specialized in bike frame welding and repair.
I also found a scientific research article on this topic. If someone has access to ScienceDirect (Cicero et al. (2011): Analysis of the cracking causes in an aluminium alloy bike frame), I'd be interested in the conclusions.
I'm interested in touring bikes, not road bikes, city bikes, etc.
I'm happy to update/clarify my question if needed, make a comment.
Topics I have researched:
- Maintenance on an Aluminium frame
- Which type of frame is better for a touring bike, steel or aluminium?
- Is it possible to repair a dent on an aluminium frame?
- What are the pros and cons between an aluminium and carbon frame?
- Is torque relevant for steel/aluminium? Where do I find torque specs?
- non-steel frames and longevity
Crack in the alu frame near the rear axe (the bike is upside down):