Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 01-06-13, 08:24 PM   #1
ericzamora
junior
Thread Starter
 
ericzamora's Avatar
 
Join Date: Oct 2012
Location: Fresno, Calif.
Bikes: Bianchi Campione D'Italia / Gary Fisher Wingra / Motobecane Nomade mixte (daughter's)
Posts: 76
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Odd stress marks on old anodized rims

I'm posting this here since the mechanics forum FAQ reminded me C&V might have more direct first-hand experience with my issue.

I've dusted off my old road bike and am currently cleaning the second pair of wheels i have. These are Wolber Super Champion Aspen tubular rims i built and raced myself back in the early 80s. DT 15 spokes, ofmega hubs. I'm noticing lighter colored discoloration at each spoke area, just on the sidewalls, on both sides of each rim. I don't recall seeing them back when i used them and they've been stored in garages since i last wore them back in the late 80s. The spokes do not seem overly tight at all by feel, though i do not have a tension meter. Also, it's only a discoloration. There is no bump i can feel at these marks at all, it's just a visual clue. is this just something that happens to hard anodized rims over time? in your experience, is there cause for concern in the rims' structural integrity?

see the attached jpeg. thanks for any input.



eric
fresno, ca.
Attached Images
File Type: jpg WolberAspenSC.jpg (74.8 KB, 96 views)
ericzamora is offline   Reply With Quote
Old 01-06-13, 08:32 PM   #2
Chombi 
Senior Member
 
Chombi's Avatar
 
Join Date: Jul 2009
Bikes: 1986 Alan Record Carbonio, 1985 Vitus Plus Carbone 7, 1984 Peugeot PSV, 1972 Line Seeker, 1986(est.) Medici Aerodynamic (Project), 1985(est.) Peugeot PY10FC
Posts: 10,852
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
A lot of lightweight rims from back then seem to "suffer" from this where the sidewalls tend to deflect slightly with the tension from the spokes so that the dark anodizing would wear off at these slightly bulged out areas on the rim. Eventually you will have two tone sidewalls with alternating dark and light areas where the anodizing had worn off. Very common to see on wheelset with very light rims like Mavic's GEL280 and to some extent, their 330GLs too.
I would say, don't worry about it....

Chombi
Chombi is offline   Reply With Quote
Old 01-06-13, 08:37 PM   #3
roadrunner2012
Banned
 
Join Date: Mar 2012
Bikes:
Posts: 491
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Don't worry, just ride.

They are fine.
roadrunner2012 is offline   Reply With Quote
Old 01-06-13, 11:03 PM   #4
CMC SanDiego 
Senior Member
 
CMC SanDiego's Avatar
 
Join Date: Jan 2009
Location: San Diego
Bikes: Ti Mongoose Pro-Cipressa w/DA, Giordana-XL Strada, Eddy Merckx OS Strada, Ti DBR-Mtn (hardtail), Fuji-Touring Series V, Raleigh SuperCourse X-tracycle, Burley Tandem
Posts: 718
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I've got some Tom Ritchey Rims, red anodized, that are also showing some lighter looking "stress marks" radiating out from almost each spoke hole. I replaced them but have them hanging in my shop. Do you think they are safe to ride? I really liked those wheels...
CMC SanDiego is offline   Reply With Quote
Old 01-07-13, 08:17 AM   #5
Ex Pres
#39
 
Ex Pres's Avatar
 
Join Date: Dec 2007
Location: the 35223 (AL)
Bikes:
Posts: 6,260
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Don't worry, they'll get even worse looking until all the ano is gone. I have a set of Mavics further down the path than yours are.
(The alternating light and dark areas)
Ex Pres is offline   Reply With Quote
Old 01-07-13, 12:01 PM   #6
puchfinnland 
MIKE is my name!
 
puchfinnland's Avatar
 
Join Date: Mar 2012
Location: finland,baltimore
Bikes: hans lutz, , puch mistral ultima,2x Austro Daimler Smoked chrome Ultima,Austro Daimler Mixte,Austro Daimler 531 mixte, flying arrow,F Moser,
Posts: 2,880
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Just go ride it, they are fine,
__________________
My name is Michael, and I am a recovering bike addict, It has been 11 months since I purchased a bicycle for myself..
(Im bound to fall off the wagon again, its just a matter of time)
Lord help me!

"Some cream crackers, a glue gun and a little imagination can turn any domestic cat into a fearsome Stegosaurus."
puchfinnland is offline   Reply With Quote
Old 01-07-13, 12:05 PM   #7
ThermionicScott 
Gratuitous glib and snark
 
ThermionicScott's Avatar
 
Join Date: Aug 2011
Location: CID
Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers)
Posts: 13,414
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 134 Post(s)
I have some red label Arayas that have a wave in the brake track for every spoke as well. I'll post a pic when I get home.
__________________
Quote:
Originally Posted by chandltp View Post
There's no such thing as too far.. just lack of time
RUSA #7498
ThermionicScott is offline   Reply With Quote
Old 01-07-13, 01:04 PM   #8
repechage
Senior Member
 
Join Date: Jun 2006
Bikes:
Posts: 10,842
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 65 Post(s)
Quote:
Originally Posted by Chombi View Post
A lot of lightweight rims from back then seem to "suffer" from this where the sidewalls tend to deflect slightly with the tension from the spokes so that the dark anodizing would wear off at these slightly bulged out areas on the rim. Eventually you will have two tone sidewalls with alternating dark and light areas where the anodizing had worn off. Very common to see on wheelset with very light rims like Mavic's GEL280 and to some extent, their 330GLs too.
I would say, don't worry about it....

Chombi
Happens on some bright rims too, it is just harder to see. Interesting as not all rims are equally effected. Makes me think the ferules were set / dimensioned in such a way that the end of the bell carries the load and or there is compression there, and it is just visible once you lace them up and use them.
repechage is offline   Reply With Quote
Old 01-07-13, 01:11 PM   #9
RubberLegs
Senior Member
 
RubberLegs's Avatar
 
Join Date: Mar 2011
Location: Tampa Bay, Florida
Bikes: 87 Bridgestone 550 (Shocking Electric Metallic Pink)
Posts: 1,730
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have that on a pair of Red label Araya rims as well, (dark bronze anodizing) Nice light, 32 hole rims...just hanging in the garage...wasn't sure if I should waste the time and effort to find some hubs and relace them. I guess the answer is YES. One has slightly more pronounced wear than the other, so I guess the less worn goes for a front wheel to even out the wear on the pair.
RubberLegs is offline   Reply With Quote
Old 01-07-13, 01:28 PM   #10
Otto Rax
Amazing, but true...
 
Join Date: Dec 2006
Bikes:
Posts: 408
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Just check for signs of cracking at the eyelets
Otto Rax is offline   Reply With Quote
Old 01-07-13, 02:26 PM   #11
ThermionicScott 
Gratuitous glib and snark
 
ThermionicScott's Avatar
 
Join Date: Aug 2011
Location: CID
Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers)
Posts: 13,414
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 134 Post(s)
Quote:
Originally Posted by RubberLegs View Post
I have that on a pair of Red label Araya rims as well, (dark bronze anodizing) Nice light, 32 hole rims...just hanging in the garage...wasn't sure if I should waste the time and effort to find some hubs and relace them. I guess the answer is YES. One has slightly more pronounced wear than the other, so I guess the less worn goes for a front wheel to even out the wear on the pair.
They've been great, durable rims for me. If I weren't planning to go with wider rims eventually, I'd ask to buy yours for when these wear out.
__________________
Quote:
Originally Posted by chandltp View Post
There's no such thing as too far.. just lack of time
RUSA #7498
ThermionicScott is offline   Reply With Quote
Old 01-07-13, 02:51 PM   #12
RubberLegs
Senior Member
 
RubberLegs's Avatar
 
Join Date: Mar 2011
Location: Tampa Bay, Florida
Bikes: 87 Bridgestone 550 (Shocking Electric Metallic Pink)
Posts: 1,730
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
They may go up for trade/swap....not sure if I am up to "Weaving" my own wheels yet....have a nice pair of HF Campys (36) that need hoops at some point too.....that match up just won't work...32 rims, 36 hubs! ;-) I do have some other Araya rims (36) on built up wheels I may rebuild with the Campys if I ever get the nerve up!
RubberLegs is offline   Reply With Quote
Old 01-08-13, 01:20 PM   #13
RubberLegs
Senior Member
 
RubberLegs's Avatar
 
Join Date: Mar 2011
Location: Tampa Bay, Florida
Bikes: 87 Bridgestone 550 (Shocking Electric Metallic Pink)
Posts: 1,730
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If I do get this laced up, where will more of the wear occur, front, with harder braking, or back with more of the running load?
RubberLegs is offline   Reply With Quote
Old 01-08-13, 01:28 PM   #14
Chombi 
Senior Member
 
Chombi's Avatar
 
Join Date: Jul 2009
Bikes: 1986 Alan Record Carbonio, 1985 Vitus Plus Carbone 7, 1984 Peugeot PSV, 1972 Line Seeker, 1986(est.) Medici Aerodynamic (Project), 1985(est.) Peugeot PY10FC
Posts: 10,852
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Front,...that is if you brake properly most of the time with more braking biased towards the front wheel.
Chombi is offline   Reply With Quote
Old 01-08-13, 08:09 PM   #15
ThermionicScott 
Gratuitous glib and snark
 
ThermionicScott's Avatar
 
Join Date: Aug 2011
Location: CID
Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers)
Posts: 13,414
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 134 Post(s)
Here are my (characteristically awful) pics of the front rim:



The rear rim (not pictured) has more of a smooth, even wear pattern -- likely from just using the rear brake for so long before seeing the light.

In contrast, here's how they looked when I bought the bike 5000 miles or so ago:


(I was kinda obsessed with those new shoes and pedals when I first bought everything.)
__________________
Quote:
Originally Posted by chandltp View Post
There's no such thing as too far.. just lack of time
RUSA #7498
ThermionicScott is offline   Reply With Quote
Old 01-08-13, 08:35 PM   #16
RubberLegs
Senior Member
 
RubberLegs's Avatar
 
Join Date: Mar 2011
Location: Tampa Bay, Florida
Bikes: 87 Bridgestone 550 (Shocking Electric Metallic Pink)
Posts: 1,730
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
WOW! Makes mine look almost MINT! :-)
RubberLegs is offline   Reply With Quote
Old 01-08-13, 08:40 PM   #17
Otto Rax
Amazing, but true...
 
Join Date: Dec 2006
Bikes:
Posts: 408
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ThermionicScott View Post
Here are my (characteristically awful) pics of the front rim:


.)
Please tell me that you've checked the material thickness of your sidewall... That looks like a classic case of boom-alum when you pump them up and the the sidewall blows off half the rim at Mach 2, usually towards your crotch, and often with shrapnel. Just sayin...seen it happen
Otto Rax is offline   Reply With Quote
Old 01-08-13, 09:27 PM   #18
ThermionicScott 
Gratuitous glib and snark
 
ThermionicScott's Avatar
 
Join Date: Aug 2011
Location: CID
Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers)
Posts: 13,414
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 134 Post(s)
I've used a straightedge to check for concavity with the tires deflated, and couldn't find any. I think my pictures just make things look worse than they are.
__________________
Quote:
Originally Posted by chandltp View Post
There's no such thing as too far.. just lack of time
RUSA #7498
ThermionicScott is offline   Reply With Quote
Old 01-09-13, 01:41 PM   #19
diamacleod
Junior Member
 
Join Date: Jan 2013
Bikes:
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Not seeing this, I just started a related thread in the Bicycle Mechanics Forum: search for 'scalloped wear pattern on wheelrims". Most respondents said it's no cause for concern.
diamacleod is offline   Reply With Quote
Old 01-09-13, 04:34 PM   #20
hueyhoolihan
Senior Member
 
Join Date: Dec 2010
Location: Above ground, Walnut Creek, Ca
Bikes: 7⃥ 9 road bikes
Posts: 6,401
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
anodized rims that wear through to the metal below and still look good? no way.

often wonder why manufacturers and the public never see this coming.

i wonder too about flat black cars bikes, motorcycles and other items and what they will look like in a few years. that type of finish always ages like this one.

i've had more pleasant nightmares....
Attached Images
File Type: jpg kirstieuj9.jpg (43.8 KB, 3 views)

Last edited by hueyhoolihan; 01-09-13 at 07:57 PM.
hueyhoolihan is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 04:05 AM.