They have a slight flange on the inside

28-34t oval rings

the saddle also rocks slightly to follow the movement of your sit bones

It's frustrating right

35mm stanchion for super stiffness

Fox Flexair Youth Shorts - Youth L-26 - Steel Grey PLP|EMTB Optimised They have a slight flangeThe Fox Flexair Youth Shorts feature a durable stretch fabric with body mapped perforations for maximum airflow. The race ratchet closure provides a secure fit and quick on the fly adjustments Features: Secure zippered hand pockets TruMotion all way stretch fabric offers a full range of motion increasing mobility Body mapped laser perforated areas on front and back panels increase airflow keeping you cool Durable Water Repellent finish sheds moisture,