
There’s a mini-fuss at the moment over some of the UCI rules. Specifically rule 1.3.014 requires the saddle to be level:
1.3.014 The saddle support shall be horizontal. The length of the saddle shall be 24 cm minimum and 30 cm maximum.
Only during the season some riders have been using a tilt on their saddle. Some prefer this position naturally but there are biomechanical gains possible for a time trial where the rider tips the nose of the saddle down. When turning a big gear they can push against the saddle as they push down on the pedals. If it helps, think of it like doing a leg press when you’re seated, if you want to push big weights whilst seated then it helps to do it with your back against something. In years past some riders have gone to extreme examples which have since been banned.
Read more