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 06-17-10, 10:11 AM   #1
shrinkboy
Senior Member
Thread Starter
 
shrinkboy's Avatar
 
Join Date: Sep 2009
Bikes:
Posts: 629
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
straightening dinged rims

my Dawes Echelon came with original equipment Rigida AL 1320 rims on the Maillard hubs. when i got it, the rear wheel was way out of true, and i asked my local LBS guy to true it up. after he got it, he called me up to say he wouldn't recommend re-using that rim, as it had too many lip dings and bends. so we built a new wheel on the old hubs, but it kept bothering me that i had this nice looking AL 1320, which i now realized is really hard to find a replacement for.

i started looking at the dings on the old rim and realized that i could probably put it back true by using a big adjustable wrench to gently pry them out. which i did with really good looking results.

you can see my question coming, right? is this an acceptable practice? can a sound new wheel be built on this rim?

cuda's 'cold set' query post got me to thinking about this....
shrinkboy is offline   Reply With Quote
Old 06-17-10, 10:21 AM   #2
dgodave
Behold my avatar:
 
dgodave's Avatar
 
Join Date: May 2006
Location: SW Colorado
Bikes: 2106 Specialized AWOL, 2013 Surly Krampus, 1983 Trek 620
Posts: 593
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 923 Post(s)
I have bent rim dings back into shape many a time, with mostly fine results.
.
BUT... thats for wheels that were already built up, that I wanted to keep rolling. I think if I was going to the trouble of building new wheels I might want to avoid pre-damaged rims. I dunno.
.
dgodave is offline   Reply With Quote
Old 06-17-10, 10:23 AM   #3
cudak888 
www.theheadbadge.com
 
cudak888's Avatar
 
Join Date: Sep 2005
Location: Southern Florida
Bikes: http://www.theheadbadge.com
Posts: 22,746
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Why is it that EVERY AL-1320 have edge dings? It's as if they came with them from the factory like that - all of 'em.

-Kurt
__________________
cudak888 is offline   Reply With Quote
Old 06-17-10, 10:24 AM   #4
shrinkboy
Senior Member
Thread Starter
 
shrinkboy's Avatar
 
Join Date: Sep 2009
Bikes:
Posts: 629
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
got the logic there, for sure. but the AL 1320 is a neat rim, and hard to find....kind of a C & V thing....
shrinkboy is offline   Reply With Quote
Old 06-17-10, 10:25 AM   #5
shrinkboy
Senior Member
Thread Starter
 
shrinkboy's Avatar
 
Join Date: Sep 2009
Bikes:
Posts: 629
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
have you straightened and re-used them, cuda?
shrinkboy is offline   Reply With Quote
Old 06-17-10, 10:28 AM   #6
rhm
multimodal commuter
 
rhm's Avatar
 
Join Date: Nov 2006
Location: NJ, NYC, LI
Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...
Posts: 16,097
Mentioned: 53 Post(s)
Tagged: 0 Thread(s)
Quoted: 233 Post(s)
I'm sure you can build a sound wheel, just don't expect it to be a new wheel.

Tom posted recently that you can use a compass to draw a circle on a perfectly flat floor, then lay the rim on it to find dips and bends and such, and bend as necessary. Makes me wish I had a perfectly flat floor somewhere!

It's going to be labor intensive, so not worth your mechanic's time, but if you value the vintage rim I believe it is worth your time. Bear in mind that repeated bending is not good for aluminum, so it's best to get it right on the first bend. I'm pretty sure you can get a round and true wheel with reasonably even spoke tension. On account of the dents and such, I suspect you will feel some unevenness in braking, though.
rhm is offline   Reply With Quote
Old 06-17-10, 10:32 AM   #7
shrinkboy
Senior Member
Thread Starter
 
shrinkboy's Avatar
 
Join Date: Sep 2009
Bikes:
Posts: 629
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
the wheel's circle is true, its the rim dings that he felt were not acceptable.
shrinkboy is offline   Reply With Quote
Old 06-17-10, 10:41 AM   #8
dgodave
Behold my avatar:
 
dgodave's Avatar
 
Join Date: May 2006
Location: SW Colorado
Bikes: 2106 Specialized AWOL, 2013 Surly Krampus, 1983 Trek 620
Posts: 593
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 923 Post(s)
My re-bent rim edges typically gave me years more of riding.... but often I could still feel the ding in the braking. Never got it perfect.
.
dgodave is offline   Reply With Quote
Old 06-17-10, 12:26 PM   #9
bikemore 
Too many bikes
 
bikemore's Avatar
 
Join Date: Apr 2006
Location: Boston MA
Bikes:
Posts: 1,364
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Quote:
Originally Posted by cudak888 View Post
Why is it that EVERY AL-1320 have edge dings? It's as if they came with them from the factory like that - all of 'em.

-Kurt
1+ on that. It is weird that so many of mine have bends and dings. Well a few won't be mine for long. Going to Bike not Bombs recycle pile.
bikemore is offline   Reply With Quote
Old 06-17-10, 12:57 PM   #10
balindamood 
Wrench Savant
 
balindamood's Avatar
 
Join Date: Mar 2006
Location: 61 Degrees North
Bikes: www.2nd-cycles.com
Posts: 2,202
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
There is a tool, relativly easy to find on ebay, that may help. This one is by Bicycle Research, but I know others, including VAR, also made them. In a pinch, Park makes a relatively useless tool for seating tires that can be modified to do the same thing. In my experience, it rarely gets the rims back to perfect, pre-ding, but with practice you can usually get them close enough.

__________________
"Where you come from is gone;
where you are headed weren't never there;
and where you are ain't no good unless you can get away from it."
balindamood is offline   Reply With Quote
Old 06-17-10, 02:10 PM   #11
bobbycorno
Senior Member
 
bobbycorno's Avatar
 
Join Date: Sep 2007
Bikes:
Posts: 2,544
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by shrinkboy View Post
got the logic there, for sure. but the AL 1320 is a neat rim, and hard to find....kind of a C & V thing....
Well, they look cool, and they're pretty light, but the metal is so soft they dent if you look at 'em funny. VO has a rim that looks pretty similar, and not too pricy:
http://www.velo-orange.com/vopari.html

SP
Bend, OR
bobbycorno is offline   Reply With Quote
Old 06-17-10, 02:17 PM   #12
SJX426 
Senior Member
 
SJX426's Avatar
 
Join Date: May 2008
Location: Alexandria, Va
Bikes: '72 Motobecane Le Champion(totaled), '73 Bottecchia Giro d'Italia, '83 Colnago Superissimo, '84 Trek 610, '84 Trek 760, '94 Burley Duet, '88 Pinarello Tre Cime, '88 Masi Gran Corsa, '91 Pinarello Montello, '97 Specialized RockHopper, 2010 Langster
Posts: 4,980
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 45 Post(s)
I have 3 1320 that are fine except the are not true axially (sp?). I have had some success if they were not too far out, but these are difficult. A flat floor is just the beginning of the challenge. Even AL has some elasticity and to get it right enough to use spoke tension to get it straight is a very difficult challenge. But..... I will continue to try 'cause the prices of rims is tooooooo much. I will likely break down and get the VO rims. They do have a taller sidewall and are different. I suspect they are less delicate as the 1320 are very soft.
SJX426 is offline   Reply With Quote
Old 06-17-10, 03:52 PM   #13
nlerner
Senior Member
 
Join Date: Dec 2005
Bikes:
Posts: 10,239
Mentioned: 29 Post(s)
Tagged: 0 Thread(s)
Quoted: 203 Post(s)
I agree that the Rigida 1320 rims are quite soft when building a wheel. But last fall, I was doing something stupid, carrying a basket that was just hanging off my handlebars. Before I knew it, the basket struts went into my front wheel, locked it up, and sent me over the handlebars to crash land and do a face plant. I was nicely scraped up, but the Rigida 1320 rim didn't even come close to going out of true.

Neal
nlerner is offline   Reply With Quote
Old 06-17-10, 04:47 PM   #14
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Bikes:
Posts: 14,843
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
all my C&V bikes have Rigida rims on them. I used to prefer Super Champion, but for some reason my boss didn't feel like ordering them. I have some of the 1320 rims that I have ridden for 30 years and they are still in good true. Finally broke a spoke last year, but the wheel just trued right up again. I would like to retire them from daily use, but I haven't gotten around to replacing the wheels yet

I don't think that I would ride one that had been straightened though. Maybe around town.

If a rim has a ding on it, it means it was ridden with low pressure in the tires or hit something really hard. I hardly expect any rims from the '70s to hold up to that sort of thing.
unterhausen is offline   Reply With Quote
Old 06-17-10, 05:27 PM   #15
cudak888 
www.theheadbadge.com
 
cudak888's Avatar
 
Join Date: Sep 2005
Location: Southern Florida
Bikes: http://www.theheadbadge.com
Posts: 22,746
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Quote:
Originally Posted by nlerner View Post
I agree that the Rigida 1320 rims are quite soft when building a wheel.
They are, but Mavic MA-2's are worse in the truing department. That's the thing with the Rigidas - they're soft, but they make for a very sturdy wheel once trued.

-Kurt
__________________
cudak888 is offline   Reply With Quote
Old 06-18-10, 03:51 PM   #16
randyjawa 
Senior Member
 
randyjawa's Avatar
 
Join Date: Apr 2007
Location: Thunder Bay, Ontario, Canada - burrrrr!
Bikes: 1982 Tomassini, 1963 Peugeot PX10, and eight special issue Canadian lightweights...
Posts: 7,448
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 106 Post(s)
I have cold set both steel and aluminum rims with great success. Of course, if the damage is too severe, repair can be impossible to implement safely when an alloy rim is in question.

Anyway, go for it. Go slow, try different techniques and see what works. What have you got to loose?
randyjawa 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 05:57 AM.