1992 World Champion Gary Havelock has announced his retirement from the sport after failing to recover from a serious crash last season.
Havelock suffered 14 broken bones in a crash during Redcar’s Cup match against Edinburgh on March 22 last year.
He said on his website: "It is with mixed emotions that I announce my retirement from the sport of speedway racing with immediate effect."
He added: "My battle with the nerve injuries in my arm has just been one bad injury too far. At the moment it is a daily struggle to try and restore full feeling back into my arm, so riding a bike would be impossible. This was never the way I wanted to retire, but fate, I guess, has a hand waiting for all of us.
"I feel very lucky to have been able to make a long and successful career out of something I loved doing most, riding my bike fast. It has been a privilege and an honour to represent my country at all levels and to represent some of the world’s greatest clubs. I will be forever grateful to all the people who have helped me along the way, not least my family.
"There are lots of memories I want to share and people I would like to thank but now is not the time for that, while I just concentrate on trying to get fit and look forward to the next chapter of my life.