Yongduam Hiking is a bike rental shop. Many Koreans enjoy cycling in Jeju Island because there are many lovely roads like Coastal Road and Olle road. Olle, which is a Jeju dialect, stands for road for strolling.
You can rent a bike at Yongduam hiking. It's very close to the Jeju city. And there are many kinds of bikes. Also they provide rental service for a raincoat, a helmet, a light, a taillight, a map, water, a rope for your luggage, and gloves. It's free.
Also, there is Jump service where you can return the bike at another place. The places are Kuakji (Aewall), Hyeopjae (Hanrim), Moseulpo (Sanbang mountain), Jungmun, Seoguipo, Pyosean, Namwon, Sungsan and Woljeongri. The rental price depends on the distance but the average is about 10,000 won.
There are no foreign language service so it might be a little inconvenient for foreign visitors; it is advisable to use a smart phone's translator app.
Address
14-4 Samdo 2(i)-dong, Jeju-si, Jeju-do, South Korea