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 12-25-05, 04:41 PM   #1
fmw
Hoosier Pedaler
Thread Starter
 
fmw's Avatar
 
Join Date: Jul 2005
Bikes:
Posts: 2,432
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
New rims

A pair of rims arrived today. They are called Mavic Open 4CD. What makes them strange is that they don't have the nice wide machined braking surface most rims have. In fact the braking surface isn't any more than about 10-12 mm wide. The rims themselves are hard anodized. What do I have? Track rims, perhaps?
__________________
Fred
A tour of my stable of bicycles
fmw is offline   Reply With Quote
Old 12-25-05, 05:22 PM   #2
supcom
You need a new bike
 
supcom's Avatar
 
Join Date: Aug 2002
Bikes:
Posts: 5,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Track rims have no need for any breaking surface. You have a road rim. Perhaps you will need to be careful setting up your brakes.

Do unknown rims just arrive at your house unexpectedly?
supcom is offline   Reply With Quote
Old 12-25-05, 05:24 PM   #3
genericbikedude
如果你能讀了這個你講中文
 
genericbikedude's Avatar
 
Join Date: Feb 2005
Location: New York
Bikes:
Posts: 3,542
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Google.
genericbikedude is offline   Reply With Quote
Old 12-25-05, 05:27 PM   #4
ctp
Senior Member
 
Join Date: Dec 2005
Location: Concord, CA
Bikes: late 80s Paramount MTB with Xtracycle, late 80s Paramount MTB converted to single speed, Bianchi Nuovo Record converted to fixie, custom Tom Board lugged steel racer, 1950s Claude Butler, 1950s Dawes, custom chopper built on 50s cruiser by me
Posts: 165
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by fmw
A pair of rims arrived today. They are called Mavic Open 4CD.
I just traded off some NOS Open 4CDs I had laying around here. Nice rims. I used to train on them a lot. I used RGC400 brakes with them, and regular pads, and never had a problem stopping.
ctp is offline   Reply With Quote
Old 12-25-05, 05:36 PM   #5
fmw
Hoosier Pedaler
Thread Starter
 
fmw's Avatar
 
Join Date: Jul 2005
Bikes:
Posts: 2,432
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by supcom
Do unknown rims just arrive at your house unexpectedly?
Yes, I'm still waiting for a set of Campy Bora wheels to show up. So far so bad. So I guess I'll have to build these into something instead.

I guess these rims will work OK. Thanks for the input.
__________________
Fred
A tour of my stable of bicycles
fmw is offline   Reply With Quote
Old 12-25-05, 05:37 PM   #6
fmw
Hoosier Pedaler
Thread Starter
 
fmw's Avatar
 
Join Date: Jul 2005
Bikes:
Posts: 2,432
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ctp
I just traded off some NOS Open 4CDs I had laying around here. Nice rims. I used to train on them a lot. I used RGC400 brakes with them, and regular pads, and never had a problem stopping.
Thanks. That gives me a boost in confidence for my first wheel build. Take care.
__________________
Fred
A tour of my stable of bicycles
fmw is offline   Reply With Quote
Old 12-25-05, 08:07 PM   #7
Svr
Senior Member
 
Svr's Avatar
 
Join Date: Dec 2005
Location: Atlanta, GA
Bikes:
Posts: 1,223
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by fmw
A pair of rims arrived today. They are called Mavic Open 4CD. What makes them strange is that they don't have the nice wide machined braking surface most rims have. In fact the braking surface isn't any more than about 10-12 mm wide. The rims themselves are hard anodized. What do I have? Track rims, perhaps?
Early '90s road rims. Machined brake surfaces weren't common until the late '90s. I'd bet the seam is pinned instead of welded.
Svr is offline   Reply With Quote
Old 12-26-05, 02:13 AM   #8
fmw
Hoosier Pedaler
Thread Starter
 
fmw's Avatar
 
Join Date: Jul 2005
Bikes:
Posts: 2,432
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Svr
Early '90s road rims. Machined brake surfaces weren't common until the late '90s. I'd bet the seam is pinned instead of welded.
You would win that bet. They seem to be nicely made. They are clinchers and drilled for presta valve. The 28 spoke holes are nicely ferruled in stainless steel. The overall rim has a gray hard anodized finish. They were new old stock and I bought the pair for $50 so I think it makes a good quality but affordable foundation for my first build. After some reading, I've decided to lace them 2 cross front and rear. I'll use my 28 spoke Garcia wheels as a template. I've settled on double butted 1.8-1.6-1.8 spokes as the way to go with them. The hubs haven't arrived yet so I haven't been able to calculate spoke lengths. I'm getting there.
__________________
Fred
A tour of my stable of bicycles
fmw is offline   Reply With Quote
Old 12-26-05, 08:01 AM   #9
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,776
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 36 Post(s)
The Open 4CD was a predecessor to the current Open Pro rim and didn't have the welded seam or machined brake tracks that came on later Mavic rims.

I had a set of these rims built on 32 hole Ultegra hubs I bought in 1995. They were reasonably light and held their trueness just fine (more the result of a good build). They weren't particularly durable as the rear rim cracked through the brake track from abraison at about 12,000 miles but the front one lasted over 30,000.

You should get good service from them and at $25 each, they were a bargain.
HillRider 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 05:51 PM.