Stage 13 of the 2025 Tour de France is an exciting day for tech nerds. It's a short stage, at just 10.9km in length, but it is both flat and mountainous at once, and a mathematical conundrum for teams ...

Does the pro peloton need to have dedicated time trial (TT) bicycles or can the riders race on a single bike throughout a stage race? Up until the 1980s riders competed in stage races with a single ...