"E.G. Summer Rider" (stylized as "E.G. summer RIDER"; stands for "E-girls Summer Rider") is a song recorded and performed by Japanese collective unit E-girls, taken as a single from their fourth studio record E.G. Crazy (2017). The track was released on July 20, 2016 through Rhythm Zone and Avex Music Creative Inc. in three physical formats—two CD's and a DVD bundle—and for digital consumption. The song was written by Kotake Masato, composed by Henrik Nordenback, Christian Fast and Lisa Desmond, and produced by Nordenback with Exile's Hiro.

"E.G. Summer Rider" serves as the opening entry for their E.G. Pop concept, which utilizes a fun and poppier. Musically, it is a J-pop number that incorporates elements of dance and dubstep, and delves into themes of having fun and the summer season. Additionally, the physical and digital packaging included the B-sides: "Kikai Shikake no Bye Bye!" and "Party In The Sun", and a Clarabell remix of the bands promotional recording "Strawberry Sadistic". "E.G. Summer Rider" is the groups first single to feature all remaining vocalists since "E.G. Anthem: We Are Venus" (2014).

Upon its release, "E.G. Summer Rider" received positive reviews from music critics, who commended the tracks sound and production, with additional compliments aimed towards their E.G. Pop concept. Commercially, it experienced success in Japan, peaking at number two on the Oricon Singles Chart and on the Japan Hot 100, the latter published by Billboard. In order to promote the single, E-girls performed in the accompanying music video, which was directed by Shigeaki Kubo, and had the band going on a road trip. Additionally, the girls sung and performed the track on several concert and shows.

After the bands new line-up changes in 2015, as managed by LDH, E-girls released three new singles; "Anniversary!!" (May 2015), "Dance Dance Dance" (September 2016) and "Merry x Merry Xmas" (December 2015). Furthermore, after distributing the promotional recording, "Dance With Me Now!", in December that year, LDH re-added vocalist Yuzuna Takebe to the girl group, and published their first greatest hits retrospect E.G. Smile: E-girls Best in February 2016. In June that year, E-girls announced on their website about two new singles: "E.G. Summer Rider" and "Pink Champagne". Each release would commemorate a separate concept: E.G. Pop and E.G. Cool. The former track incorporated the E.G. Pop concept, which was described by their management as a combination of a "fun" and "pop[pier]" vibe. It is also the first physical single to not include member Erie Abe, whom transitioned to an accompanying disc jockey to specific songs.

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