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MAVIC OPEN CD Rims

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MAVIC OPEN CD Rims

Old 11-19-20, 07:22 AM
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serex711
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MAVIC OPEN CD Rims

The 700 x 23 tires that were included in the purchase of this bike do not fit the Open CD Rims I bought second hand. One of the stickers on this bike states 650 HV, which appears to denote the metal treatment.

What tire size do I needful this rim, is it size "650" which would mean it will accept a 650 size tire or do I need a 700c? Do I need to measure and from where to where to find out?

The photo below is not the actual rim but represents the same one I have.


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Old 11-19-20, 08:16 AM
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Measure the diameter of the rim with a tape measure, from one edge to the other. This will not be exactly the ERTRO bead-seat diameter quoted in catalogues — it will be a few millimetres more — but you should be able to tell from your measurement which size you have.

Edit: A 700c Open Pro measures 638 mm. Bead seat is 622.

Last edited by conspiratemus1; 11-19-20 at 08:25 AM.
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Old 11-20-20, 05:58 AM
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Thx..I went on to Sheldon Browns site last night and saw what you were describing.

Thank you for taking the time out to respond. I appreciate it.

Jeff
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Old 11-20-20, 06:12 AM
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@serex711 - Note the rim size in your post. They made three sizes.

I like these rims and wish I had more in stock. I don't think I have any actually.
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Old 11-20-20, 06:35 AM
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Thanks, will use that as a reference when I go through the measurement process. I have seen them up on Craigs list recently.
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Old 11-20-20, 09:09 AM
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Originally Posted by serex711 View Post
Thx..I went on to Sheldon Browns site last night and saw what you were describing.

Thank you for taking the time out to respond. I appreciate it.

Jeff
You are most welcome. Looks like you have 650c rims. These were once the bee’s knees for racing bikes for women and other short people because they allowed a frame to be built without the compromises required with 700c. (A well-designed frame will also accommodate the slightly smaller 26” wheel with adjustment of the brake shoes). Alas there seems to be not much industry support for either 650c or 26” today.
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Old 11-20-20, 11:49 AM
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fortunately I can still get the tires I want in 650x23..I always liked Mavic and wanted to keep the 80's feel for the bike though getting to tire size was a different story. I paid 40 ea.
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Old 11-20-20, 12:26 PM
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Looks like the seller offered 3 choices for rim size - 24", 650c, and 700c. Did you mean to buy the 700c rim and bought the 650c rim by mistake? A 650c wheel is not going to work on a bike designed for 700c rims.
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Old 11-20-20, 04:29 PM
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Originally Posted by serex711 View Post
fortunately I can still get the tires I want in 650x23..I always liked Mavic and wanted to keep the 80's feel for the bike though getting to tire size was a different story. I paid 40 ea.
Even if you can get the tires, you won't be able to use 650c wheels in a standard typical road bicycle, which requires 700c wheels. They were made for small-framed bikes for juniors, people under 5'4" (so very popular with women racers), and I think they were used on triathlon bikes in the early days (according to what I've read.) When my wife was getting her small-framed bike made ~15 years ago, she settled on 26" wheels, because of the typically wider tires made for those rims, but there is enough clearance that she could have used 650c if she wanted. Note not the same as the more common nowadays 650b, aka "27-five" in MTB-speak.


There is a niche here for 650c. If you register and pay to list them on the For Sale sub-forum you could likely sell them easily if you don't think they would move on your local Craigs. I would be interested in them (assuming they really are 650c) if you were willing to post them to Canada. (I say that in advance because most people who list stuff in the For Sale will ship only to CONUS, for understandable reasons. I know rims are awkward to ship and if you can sell something easily domestically, why bother with the export market? As hewers of wood and diggers of coal for the world, we're the opposite: export or starve. But for importing we're not put off by high shipping costs if we want something badly enough.)


Disclaimer: this is not a solicitation to purchase something by evading the Forum rules for sales, nor will I entertain a "private" offer that does so.
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Old 11-20-20, 10:31 PM
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Some people may want them as front wheel spares for time trial bikes that have rear 700c/650c front setups.
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