Whilst cleaning my bike and checking for cracks I've noticed a couple of small pits (the largest is only pin head sized). They occur in the middle of the two welds where the chainstays are welded to the bottom bracket. You can see the oxidise aluminum in these pits although they don't appear to be cracks, just dimples where the two welds met that didn't get paint on them.
I've put a drop of clear car paint lacquer on as I do for all scratches on my bike but I was wondering whether there is any cause for concern.
I tend to get a bit obsessive about looking for cracks after hearing that alloy bikes can crack but I'm probably over reacting and aluminium frames are probably quite sound. The frame is 7005 T6 (plain guage) and under a year old.
Whilst cleaning my bike and checking for cracks I've noticed a couple of small pits (the largest is only pin head sized). They occur in the middle of the two welds where the chainstays are welded to the bottom bracket. You can see the oxidise aluminum in these pits although they don't appear to be cracks, just dimples where the two welds met that didn't get paint on them.
I've put a drop of clear car paint lacquer on as I do for all scratches on my bike but I was wondering whether there is any cause for concern.
No.
Quoted message said:
I tend to get a bit obsessive about looking for cracks after hearing that alloy bikes can crack but I'm probably over reacting and aluminium frames are probably quite sound. The frame is 7005 T6 (plain guage) and under a year old.
It's a good idea to regularly inspect all bicycle frames. This is not over reacting - every kind of bicycle can be broken.
If you are really worried pop down to a local engineering shop. They have a special liquid and UV lamp that will confirm whether there are any cracks. You are probably worrying too much though
"All truth goes through three steps: First, it is ridiculed. Second, it is violently opposed. Finally, it is accepted as self-evident." Arthur Schopenhauer
In "]news:[email hidden], Paul <[email hidden]> typed:
Quoted message said:
Whilst cleaning my bike and checking for cracks I've noticed a couple of small pits (the largest is only pin head sized). They occur in the middle of the two welds where the chainstays are welded to the bottom bracket. You can see the oxidise aluminum in these pits although they don't appear to be cracks, just dimples where the two welds met that didn't get paint on them.
I've put a drop of clear car paint lacquer on as I do for all scratches on my bike but I was wondering whether there is any cause for concern.
I tend to get a bit obsessive about looking for cracks after hearing that alloy bikes can crack but I'm probably over reacting and aluminium frames are probably quite sound. The frame is 7005 T6 (plain guage) and under a year old.
"local engineering shop"... not too sure what to look for, and it'd be nice to know about my little cratch/scrack there before I send it away for a month! Do you mean either an autoshop type place or a company that does machining that wouldn't mind taking a few minutes to check?
Thanks!
Jon Bond
"Tony Raven" <[email hidden]> wrote in message "]news:[email hidden]...
Quoted message said:
If you are really worried pop down to a local engineering shop. They have
a
Quoted message said:
special liquid and UV lamp that will confirm whether there are any cracks. You are probably worrying too much though
"All truth goes through three steps: First, it is ridiculed. Second, it is violently opposed. Finally, it is accepted as self-evident." Arthur Schopenhauer
In "]news:[email hidden], Paul <[email hidden]> typed:
Quoted message said:
Whilst cleaning my bike and checking for cracks I've noticed a couple of small pits (the largest is only pin head sized). They occur in the middle of the two welds where the chainstays are welded to the bottom bracket. You can see the oxidise aluminum in these pits although they don't appear to be cracks, just dimples where the two welds met that didn't get paint on them.
I've put a drop of clear car paint lacquer on as I do for all scratches on my bike but I was wondering whether there is any cause for concern.
I tend to get a bit obsessive about looking for cracks after hearing that alloy bikes can crack but I'm probably over reacting and aluminium frames are probably quite sound. The frame is 7005 T6 (plain guage) and under a year old.
In news:NwQEa.913255$Zo.209126@sccrnsc03, Jon Bond <[email hidden]> typed:
Quoted message said:
"local engineering shop"... not too sure what to look for, and it'd be nice to know about my little cratch/scrack there before I send it away for a month! Do you mean either an autoshop type place or a company that does machining that wouldn't mind taking a few minutes to check?
Thanks!
Jon Bond
Place that does machining of metals. If you have a Mechanical Engineering School at Tufts they can probably do it for you.
"All truth goes through three steps: First, it is ridiculed. Second, it is violently opposed. Finally, it is accepted as self-evident." Arthur Schopenhauer
"Tony Raven" <[email hidden]> wrote in message "]news:[email hidden]...
Quoted message said:
In news:NwQEa.913255$Zo.209126@sccrnsc03, Jon Bond <[email hidden]> typed:
Quoted message said:
"local engineering shop"... not too sure what to look for, and it'd be nice to know about my little cratch/scrack there before I send it away for a month! Do you mean either an autoshop type place or a company that does machining that wouldn't mind taking a few minutes to check?
Thanks!
Jon Bond
Place that does machining of metals. If you have a Mechanical Engineering School at Tufts they can probably do it for you.
Tony
I'm in the Mech E. school 😉 Unfortunately, being summer, I'm not at Tufts, which is why I was wondering where to find some here in boring ol' CT!
