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 11-11-10, 03:31 PM   #1
peripatetic
Senior Member
Thread Starter
 
peripatetic's Avatar
 
Join Date: Oct 2004
Location: NYC
Bikes: All 70s and 80s, only steel.
Posts: 2,124
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
27" replacement rim for a Mavic MA 40?

Trying to plumb the wisdom of this crowd.

I don't have extra spokes lying around, nor am I really able to do much work at all on my bike, as I'm staying in a tiny apt. for a friend. So I can't measure the ERD of my bent MA 40 rim. Just trying to see if someone here might know offhand:

(1) What's the ERD of this rim (27", MA 40)?
(2) Is there a currently manufactured rim (Weinmann?) I could use to replace this rim w/o having to swap spokes? Or does someone know some obscure seller who happens to have a stash of these for sale? (I already posted on the ISO thread with no luck, so I realize it's not likely).

(I found one replacement on ebay, but the seller's in the UK and wants something like 90 bucks for the rim, plus a large added shipping charge. That would undermine my whole purpose here, which is to replace the rim at a minimum of cost.)

Ideally, I'd like anything similar--double-walled, eyelets, etc.

TIA for any helpful suggestion or just encyclopedic info.
peripatetic is offline   Reply With Quote
Old 11-11-10, 03:44 PM   #2
dbakl
Senior Member
 
Join Date: Nov 2005
Bikes: Cinelli, Paramount, Raleigh, Carlton, Zeus, Gemniani, Frejus, Legnano, Pinarello, Falcon
Posts: 5,775
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I picked up a pair on ebay not too long ago, but they're 700, gray anodized... Keep looking, its out there somewhere.

If its a similarly designed rim I don't think you'd have to change the spokes. Loosen the all, tape the new rim next to the old, transfer the spokes one at a time without removing from hub, retension and true.
dbakl is offline   Reply With Quote
Old 11-11-10, 04:25 PM   #3
CV-6 
If I own it, I ride it
 
CV-6's Avatar
 
Join Date: Nov 2005
Location: Cardinal Country
Bikes: Lejeune, Raleigh, Raysport, Jan De Reus, Gazelle, Masi, B. Carré, Springfield, Motobecane, John Howard
Posts: 4,135
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
According to Spocalc, the ERD for the 27 inch MA40 is 618mm.

You can download Spocalc here. It will give you the ERDs you need, but will not provide you with any descriptions of the rims.
__________________
Lynn Travers

Photos
CV-6 is offline   Reply With Quote
Old 11-11-10, 04:37 PM   #4
clubman 
Youngman Grande
 
clubman's Avatar
 
Join Date: Jan 2010
Location: Nova Scotia
Bikes: roadsters, club bikes, fixed and classic
Posts: 3,101
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 60 Post(s)
I think you'll be fortunate to get an exact match without buying another MA40. Sutherlands rim charts show 27" Mavic rims varying by as much as 4 mm so even another Mavic can be wrong. ERD calculations can also be inexact.

Maybe a used wheel is an easy and cheap option? Front, rear, spacing?
clubman is offline   Reply With Quote
Old 11-11-10, 06:22 PM   #5
peripatetic
Senior Member
Thread Starter
 
peripatetic's Avatar
 
Join Date: Oct 2004
Location: NYC
Bikes: All 70s and 80s, only steel.
Posts: 2,124
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Hey, thanks for the feedback and tips. Clubman, I actually thought I had found a great option today--a double-walled Rigida w/ Maillard hub on CL for $20. Unfortunately, it turned out to be 700c size. This is from my '82 Trek 412, and I am trying to keep the thing as close as possible. Also, when I tried to bend the rim of the MA 40 back today, one edge actually cracked, and it's now officially toast. The tire I have on is actually a very lightly used, original Michelin, as well, so I'm just hoping I can swap everything over but the rim.

The rear spacing, I'm fairly certain is 126 mm (6-sp Suntour freewheel, unaltered); front is a double-walled Rigida rim, which is why I'm sticking with the double-walled. They also just seem much nicer than some of the other 27" wheels I've had (most of which were box-rim and single-walled).

Anyway, thanks for the feedback. CV-6, thanks for the ERD and the link to spocalc. I had forgot about that. I'll hunt around for a rim that might match.
peripatetic is offline   Reply With Quote
Old 11-11-10, 06:56 PM   #6
nania
Member
 
Join Date: Aug 2007
Bikes:
Posts: 39
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I think I have a 27" MA40 hanging around next to an A.V.A. Tubular and need A Rigida 700c 1320 rim so if you still have access to that wheel, we may be able to trade.
nania 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 04:47 PM.