Short inseam cycling pants—those ending well above mid-thigh—aren't just for triathletes, though that's where you'll see them most. They're also a solid choice for hot-weather road riding, indoor training sessions, or anyone who simply runs warm and wants maximum ventilation.
The big advantage is cooling: less fabric means better airflow and less sweat buildup. The trade-off is reduced muscle compression compared to standard or longer lengths, which matters more on long, demanding rides. Shorter legs can also ride up on some body types, since the gripper has less thigh to hold onto.
If you primarily ride in scorching heat, spend most of your time on the trainer, or do triathlons, short-length pants are worth considering. For general road cycling or longer endurance rides, standard or long inseams typically offer better comfort and support.