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 Post subject: Mavic rims??? Meaning!!
PostPosted: Tue Dec 18, 2012 4:11 pm 
rBoTM Winner
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What does the 'SUP' mean on Mavic rims :?:

Ian.


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PostPosted: Tue Dec 18, 2012 4:25 pm 
retrobike rider
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SUP – Soude Usine Process – very loosely translated = "Factory Welded Process". Rims are made from long bent extrusions of alloy. The ends of the extrustion, once bent into a circle, needs to be joined and this can be done through an inexpensive and rough pin joint or by welding. All better quality aluminum rims are welded instead of using looser and less expensive pin joints as welding is more consistent, laterally stiffer, and more durable. When combined with a braking surface milling process like UB Control, a welded rim also offers smoother braking performance and better modulation. SUP is found on all alloy rim Ksyrium, R-Sys and Cosmic wheels.

from here:

http://fitwerx.com/product-reviews/whee ... iles/mavic


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PostPosted: Tue Dec 18, 2012 4:48 pm 
rBoTM Winner
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Thanks for that Twain :wink:

Its been racking my brain since I got my Gios :oops:


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PostPosted: Tue Dec 18, 2012 9:35 pm 
retrobike rider
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no worries! i wanted to know as soon as you asked


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PostPosted: Wed Dec 19, 2012 12:40 am 
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twain wrote:
SUP – Soude Usine Process – very loosely translated = "Factory Welded Process".

There are a couple of missing accents that make a subtle difference to the meaning. "Soudé" means welded. "Usine" is a noun meaning factory, but "usiné" is an adjective meaning milled or machined. So a slightly better translation is "welded machined process".

http://sheldonbrown.com/gloss_st-z.html#sup


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PostPosted: Wed Dec 19, 2012 2:11 pm 
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"After bending, the rim joint is arc welded. The welded seam is then milled for a smooth finish".

You can't beat a smooth finish :)


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PostPosted: Wed Dec 19, 2012 2:23 pm 
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Joined: Tue Oct 09, 2007 1:55 pm
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Definitely they make a smoother-braking rim. I'd question the durability - spoke tension holds any joint together, but I have had two Mavic rims fail where the rim has cracked tangentially along the braking surface from the weld point.

A simple pinned joint doesn't have the weakness from the weld to initiate cracks.


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PostPosted: Thu Dec 20, 2012 12:53 am 
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it was the mavic front hubs that used to fail on me!

turns out that they didn't like being radially spoked and hurtled down long pothole strewn stirlingshire descents - two or three of the flange holes would give way at a time - they made a dramatic BANG! sound before sending the rim into a disconcerting "s" shape before one's bloodshot and streaming eyes!!

:shock:


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PostPosted: Fri Dec 21, 2012 12:19 am 
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For all those from the dark ages we all remember the "thump..thump....thump" as we squeezed the brakes on the old Fiamme / AVA / Superchamp rims as they passed over the join :)

Happy days LOL

Shaun


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