Originally Posted by
wens
There's a minimum length in the rules, but those saddles are mostly designed for fitting into the UCI 5 cm behind the bb rule, and so they're also over the minimum length.
The 5 cm rule does not apply to track sprinting per UCI rules (unless there is another invisible superseding change to the rules)
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 sprint event on track (flying 200 m, flying lap, sprint, team sprint, keirin, 500 metres and 1 kilometre); however, in no circumstances shall the peak of the saddle extend in front of a vertical line passing through the bottom bracket spindle.