Joonas Nikolai Kylmäkorpi (born 14 February 1980) is a Finnish former motorcycle speedway rider and is a four times Long Track World Champion. He earned 12 caps for the Finland national speedway team.
Nicknamed the Flying Finn, he represented Finland in the Speedway World Cup and won a bronze medal at the Finnish Individual Speedway Championship in 2002.
However, his real success has come on the longtrack where he won four World Championships in 2010, 2011, 2012 and 2013
Kylmäkorpi rode in the British leagues from 2001 to 2016, starting with Eastbourne Eagles in 2001. At Eastbourne he replaced fellow Finnish rider Petri Kokko. He finished his British leagues career at Eastbourne as their number one rider in 2012.
Finalist 2000 Saint-Colomb-de-Lauzun 15pts (5th overall).
After finishing his sports career in 2017 due to a career-ending injury in December 2016, Joonas Kylmäkorpi began pursuing entrepreneurship. In 2022 Kylmäkorpi co-founded a nicotine pouch manufacturing company with a factory in Poznaà Â, Poland. In 2024, the company introduced their own brand, LUMI, and launched an online shop, TheLumiClub.com.