Bike Forums - View Single Post - Check out the forks on this ride

03-05-19 | 11:54 AM

#19

SJX426

Senior Member

Joined: May 2008

Posts: 10,106

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From: Fredericksburg, Va

Bikes: ? Proteous, '65 Frejus TDF, '73 Bottecchia Giro d'Italia, '83 Colnago Superissimo, '84 Trek 610, '84 Trek 760, '88 Pinarello Veneto, '88 De Rosa Pro, '89 Pinarello Montello, 'Litespeed Catalyst'94 Burley Duet, 97 Specialized RockHopper, 2010 Langster

Once could argue that the curve in the blade not only positioned the wheel for steering performance but also provided some suspension. If you think about it, the crown always was subjected to forces associated with suspension as well. Maybe that is part of the reason for dual or triple plate crowns, to provide strength against the moment arm. there were some pretty extreme "bent" forks BITD. I always thought the following was a bit more than most but have seen others more extreme.

2008-06-01 15.25.53, on Flickr

There was a thread a couple of years ago of the Trek fork failures as a result of the moment arm forces, IIRC 1982 420"s?

And yes the crowns will deform (from the same bike):

P9051190, on Flickr

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Last edited by SJX426; 03-05-19 at 12:00 PM.

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