Straight-Pull Hub Failures

See other failures under 000.html.

Hub failures from http://www.rouesartisanales.com/article-290881.html (dated 2005/04/22) and http://www.rouesartisanales.com/32-categorie-100023.html (dated 2005/09/23) as of 2007/07/28.

Both are rear hubs using straight-pull spokes that enter raised "tabs" tangent to the hub shell. The Rigida apparently failed all three "ears" of the tab, whereas the Mavic apparently failed only the center "ear".

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According to text accompanying the photos, the Rigida wheels had about 4000-5000km service. The rider discovered the rear rim was cracked and switched to a different wheel, then during the ride both front hub flanges failed; spokes pulled out on one side but remained attached on the other. Note corrosion on axle and QR, suggesting corrosion may have played a role.

A Mavic wheel failed similarly:

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According to accompanying text, the wheel was a 2004 Mavic Ksyrium Elite 2004 with about 5000 km and less than one year use. The failure was noticed while riding at constant speed. It appears a single "ear" of the tab failed, with the outer ones intact. Note the background is the same, suggesting similar environmental exposure.