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01-21-04, 12:53 PM
My question is regarding this rule:
1.3.013 The peak of the saddle shall be a minimum of 5 cm to the
rear of a vertical plane passing through the bottom bracket spindle.
This restriction shall not be applied to the bicycle ridden by a rider in
a track sprint event, keirin, 500 meters or 1 kilometer time trials;
however, in no circumstances shall the peak of the saddle extend in
front of a vertical line passing through the bottom bracket spindle.
My bike has a 74 degree seat tube angle (not all that steep) and I use a layed back seat post (easton EC90) and my saddle is positioned in about the middle of the rails. It is a small frame (Giant TCR), so the post is extended nearly all the way to the maximum. The distance from saddle nose to BB center is still not 5 cm. It is about 3 cm.
This is a pretty standard set up for a road bike and it seems strange to me that there is almost no way I can get it to fulfill this requirement. Has anyone else noticed this about their machine? How in the world could you fulfill this requirement if you were setting up a time trial or tri bike with a steep seat tube angle?
Is the peak of the saddle the same thing as the nose of the saddle? Maybe that's where I'm confused.
1.3.013 The peak of the saddle shall be a minimum of 5 cm to the
rear of a vertical plane passing through the bottom bracket spindle.
This restriction shall not be applied to the bicycle ridden by a rider in
a track sprint event, keirin, 500 meters or 1 kilometer time trials;
however, in no circumstances shall the peak of the saddle extend in
front of a vertical line passing through the bottom bracket spindle.
My bike has a 74 degree seat tube angle (not all that steep) and I use a layed back seat post (easton EC90) and my saddle is positioned in about the middle of the rails. It is a small frame (Giant TCR), so the post is extended nearly all the way to the maximum. The distance from saddle nose to BB center is still not 5 cm. It is about 3 cm.
This is a pretty standard set up for a road bike and it seems strange to me that there is almost no way I can get it to fulfill this requirement. Has anyone else noticed this about their machine? How in the world could you fulfill this requirement if you were setting up a time trial or tri bike with a steep seat tube angle?
Is the peak of the saddle the same thing as the nose of the saddle? Maybe that's where I'm confused.