Frame mounted. GUC. Works great, child just grew out of it. https://www.thule.com/en-ca/products-_-100107?utm_source=google&utm_medium=cpc&utm_term=&utm_campaign=21271018539&utm_content=699120912152&s_kwcid=AL!15933!3!699120912152!!!g!869342901054!!21271018539!168972875944&gad_source=1&gclid=Cj0KCQjwmMayBhDuARIsAM9HM8cCg1RFNKAVY0Y065kGcHaD1Y7CaPZOKrnzhWL52xAkDgRZQNt5B50aAgFlEALw_wcB