Cracks on rims...
#1
Senior Member
Thread Starter
Join Date: Jul 2013
Location: Roanoke, Virginia
Posts: 178
Bikes: Bacchetta Giro, a MTN bike, and a road bike gathering dust
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Cracks on rims...
#2
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,505
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 139 Post(s)
Tagged: 1 Thread(s)
Quoted: 5681 Post(s)
Liked 2,386 Times
in
1,320 Posts
This is very common on some anodized rims. One factor is whether the rim was anodized after production, or if the extrusion was anodized before being rolled into hoops. Pre anodized suffers this kind of micro-cracking during the forming process. This is far less than ideal for most things, but braking would strip the anodizing anyway so it doesn't matter. However, I'd avoid pre-anodized stock if making disc only rims.
You can also get a similar effect after use because the aluminum flexes, and the anodized surface is more brittle and doesn't. You rims appear to be hard anodized, and that type is especially prone to this kind of surface checking. It's OK and will take eons to become, not OK, but if you're concerned, periodically use a wax/oil treatment applying with a rag against the spinning wheel, being careful to stay away from the brake track.
FWIW- Over the years I've had many rims with similar (non) issues, and have never had a rim structural failure of any kind except direct impact failures (aka crashes).
You can also get a similar effect after use because the aluminum flexes, and the anodized surface is more brittle and doesn't. You rims appear to be hard anodized, and that type is especially prone to this kind of surface checking. It's OK and will take eons to become, not OK, but if you're concerned, periodically use a wax/oil treatment applying with a rag against the spinning wheel, being careful to stay away from the brake track.
FWIW- Over the years I've had many rims with similar (non) issues, and have never had a rim structural failure of any kind except direct impact failures (aka crashes).
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
#3
Old Fart In Training
Join Date: Oct 2012
Posts: 2,268
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Likes: 0
Liked 22 Times
in
16 Posts
That would drive me crazy.. New bike ? I'd want warranty on them,,,
Older bike,,, time for a wheel upgrade....
I don't ride cracks of any kind even if the maker said I was safe..
Older bike,,, time for a wheel upgrade....
I don't ride cracks of any kind even if the maker said I was safe..
Last edited by osco53; 04-11-15 at 06:06 PM.
#5
Senior Member
Thread Starter
Join Date: Jul 2013
Location: Roanoke, Virginia
Posts: 178
Bikes: Bacchetta Giro, a MTN bike, and a road bike gathering dust
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
#6
Old Fart In Training
Join Date: Oct 2012
Posts: 2,268
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Likes: 0
Liked 22 Times
in
16 Posts
,,,,,Also why is the spoke just above the nipple missing some finish ???
This made me go check spokes on two bikes,,,, Mine are not like that,,,Odd
This made me go check spokes on two bikes,,,, Mine are not like that,,,Odd
#7
Senior Member
Join Date: Apr 2010
Location: Lincoln Ne
Posts: 9,920
Bikes: RANS Stratus TerraTrike Tour II
Mentioned: 46 Post(s)
Tagged: 0 Thread(s)
Quoted: 3344 Post(s)
Liked 1,054 Times
in
634 Posts
It is time for a new rim. It is either caused from flaws in the rim, or rim wear from caliper brakes that people that dont like disc brakes says almost never happens.
#8
Senior Member
Thread Starter
Join Date: Jul 2013
Location: Roanoke, Virginia
Posts: 178
Bikes: Bacchetta Giro, a MTN bike, and a road bike gathering dust
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Had a mechanic look at it yesterday. He said not to sweat it and the cracks are simply surface cracks in the finish.
#9
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,505
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 139 Post(s)
Tagged: 1 Thread(s)
Quoted: 5681 Post(s)
Liked 2,386 Times
in
1,320 Posts
See post No.2. Happy to see that the gloom and doom set didn't cause issues between you and the mechanic. I don't usually post this kind of "I told you so, but I was concerned, that people were getting you unduly worried about something that wasn't important, and that it could strain your trust in the bike and the people who sold it to you.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Last edited by FBinNY; 04-12-15 at 01:19 PM.
#10
Senior Member
Thread Starter
Join Date: Jul 2013
Location: Roanoke, Virginia
Posts: 178
Bikes: Bacchetta Giro, a MTN bike, and a road bike gathering dust
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I suppose being new and under warranty, I could go for new wheels, but it's not worth the hassle to me. The cracks are hard to see unless you're up close, so I can live with them.
#11
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,505
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 139 Post(s)
Tagged: 1 Thread(s)
Quoted: 5681 Post(s)
Liked 2,386 Times
in
1,320 Posts
If you ever have doubts or are uncomfortable with your decision, search "crazing in anodized aluminum" or similar, and you'll find serious literature on the subject. As I posted, it's common and normal on rims because of the nature of the production process, and the flexing that rims get during production, wheel building and use.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
#12
Senior Member
Join Date: Feb 2004
Location: St Peters, Missouri
Posts: 30,225
Bikes: Catrike 559 I own some others but they don't get ridden very much.
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1572 Post(s)
Liked 642 Times
in
363 Posts
For it to be caused by brake wear wouldn't it have to be on the brake track? The brake track is clearly indicated by the wear indicator groove.
__________________
My greatest fear is all of my kids standing around my coffin and talking about "how sensible" dad was.
My greatest fear is all of my kids standing around my coffin and talking about "how sensible" dad was.
#13
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,505
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 139 Post(s)
Tagged: 1 Thread(s)
Quoted: 5681 Post(s)
Liked 2,386 Times
in
1,320 Posts
But some people will seize on anything to advance an agenda. Got a rim issue? Get disc brakes. Girlfriend broke up with you?, must be hose lousy caliper brakes.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Last edited by FBinNY; 04-12-15 at 05:53 PM.
Thread
Thread Starter
Forum
Replies
Last Post
vsanzbajo
Classic & Vintage
15
10-03-15 07:30 PM