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


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 08-19-08, 02:18 AM   #1
PNB
Senior Member
Thread Starter
 
Join Date: Jun 2008
Bikes:
Posts: 108
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Spoke length and new rims.

I have a hand buillt (not by me) wheel set with 28holes DT Swiss R 1.1 rims.

As I only later read, these rims are pretty sensible and tend to develop cracks near the spokes holes.
Hopefully wonīt happen but I keep them under close watch.

Should I come to the point to have to replace the rims, the alternatives (Mavic, Ambrosio) have a some lower profile 18-19mm instead of 21.
Since the spokes are the not really cheap aero-lite Iīd like to keep them.

There is a way to do so, maybe longer nipples or should I better give it up?

Thanks!
PNB is offline   Reply With Quote
Old 08-19-08, 03:39 AM   #2
Soil_Sampler
A little North of Hell
 
Join Date: Mar 2006
Bikes:
Posts: 4,811
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 20 Post(s)
if you are using the single eyelet rim and have problems later, replace it with the double eyelet rim.

http://www.dtswiss.com/Products/Comp...ble-black.aspx
Soil_Sampler is offline   Reply With Quote
Old 08-19-08, 03:58 AM   #3
PNB
Senior Member
Thread Starter
 
Join Date: Jun 2008
Bikes:
Posts: 108
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks but not an option.
Theīre not available with 28H, I already checked.
PNB is offline   Reply With Quote
Old 08-19-08, 04:16 AM   #4
Soil_Sampler
A little North of Hell
 
Join Date: Mar 2006
Bikes:
Posts: 4,811
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 20 Post(s)
maybe the excellight then, if you have problems with your rim?

http://www.ambrosiospa.com/catalog_e...pper&Itemid=56
Soil_Sampler is offline   Reply With Quote
Old 08-19-08, 04:22 AM   #5
PNB
Senior Member
Thread Starter
 
Join Date: Jun 2008
Bikes:
Posts: 108
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Soil_Sampler View Post
maybe the excellight then, if you have problems with your rim?

http://www.ambrosiospa.com/catalog_e...pper&Itemid=56
The Excellight or (as last beach) the Open Pro would be my choices should the present rims fail.
As far as I saw they have -like specified in my first post- a lower profile 18-19mm instead of 21 like the R 1.1

Thatīs the reason of my question.
PNB is offline   Reply With Quote
Old 08-19-08, 05:06 AM   #6
Soil_Sampler
A little North of Hell
 
Join Date: Mar 2006
Bikes:
Posts: 4,811
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 20 Post(s)
Quote:
Originally Posted by PNB View Post
As far as I saw they have -like specified in my first post- a lower profile 18-19mm instead of 21 like the R 1.1

Thatīs the reason of my question.
you might be able to get away with a longer brass nipple, but I prefer my nipple heads to be fully supported by the spokes threads somewhere between the slot and the end of the nipple.

Soil_Sampler is offline   Reply With Quote
Old 08-19-08, 06:18 AM   #7
PNB
Senior Member
Thread Starter
 
Join Date: Jun 2008
Bikes:
Posts: 108
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I see what you mean, beautiful picture!
PNB is offline   Reply With Quote
Old 08-19-08, 06:28 AM   #8
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It's pretty unlikely a new rim with a different erd will allow you to reuse the same spoke length. All you can do is do the spoke calculation on the new rim and see how much different it is from your current spoke length.
operator is offline   Reply With Quote
Old 08-19-08, 08:18 AM   #9
PNB
Senior Member
Thread Starter
 
Join Date: Jun 2008
Bikes:
Posts: 108
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by operator View Post
It's pretty unlikely a new rim with a different erd will allow you to reuse the same spoke length. All you can do is do the spoke calculation on the new rim and see how much different it is from your current spoke length.
I checked and actually R1.1 and Excellight would be just 1mm off one another.
This should be feasable.
The Open Proīs are 6 mm off the R1.1 and so out of the race.
PNB is offline   Reply With Quote
Old 08-19-08, 02:15 PM   #10
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
My primary bike has a 28 hole RR 1.1 single eyelet rim on the front wheel (32 hole on rear). After 4 1/2 years of fairly rough roads I have no cracks, no problems.

Al
Al1943 is offline   Reply With Quote
Old 08-19-08, 02:24 PM   #11
PNB
Senior Member
Thread Starter
 
Join Date: Jun 2008
Bikes:
Posts: 108
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Al1943 View Post
My primary bike has a 28 hole RR 1.1 single eyelet rim on the front wheel (32 hole on rear). After 4 1/2 years of fairly rough roads I have no cracks, no problems.

Al
Hope will go that way
The problems I read of regard the rear wheel with 28H - just my case.
Had I known of it before, I would have sacrificed a couple of grams and got the 32H rear rim, but I was looking for the minimum weight.
Basically I wanted an improved version of the Mon Chasseral, with bladed spokes.

There are other factors: riderīs weight (I am around 77-78 kg) - DT Swiss rates the single eyelet up to 90kg so should be actually OK - and spoke tension.

I really hope not to get troubles but in case I want be able to react promptly.
PNB is offline   Reply With Quote
Old 08-19-08, 03:14 PM   #12
smurf hunter
Senior Member
 
smurf hunter's Avatar
 
Join Date: Feb 2007
Location: Auburn, WA
Bikes: 2006 LeMond Croix de Fer, 2005 Kona Dew Deluxe
Posts: 622
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by PNB View Post
I checked and actually R1.1 and Excellight would be just 1mm off one another.
This should be feasable.
Depends if the new one calls for 1mm longer or shorter. If the original rim was built with moderate tension, but the newer rim is 1mm larger ERD, I would attempt to rebuild with increased spoke tension and I suspect it'd break even.

I round up or down 1mm in spoke length depending on inventory. For double walled rims it's not the end of the world if threads go past the slots of the nipples, unless it means you've bottomed out the threads before reaching the appropriate tension.
smurf hunter is offline   Reply With Quote
Old 08-19-08, 06:31 PM   #13
operator
cab horn
 
Join Date: Jun 2004
Location: Toronto
Bikes: 1987 Bianchi Campione
Posts: 28,306
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by PNB View Post
I checked and actually R1.1 and Excellight would be just 1mm off one another.
This should be feasable.
The Open Proīs are 6 mm off the R1.1 and so out of the race.
That's cool. Go with that!
operator 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 10:35 AM.