The son of one of the fundraisers inspired the challenge after surviving childhood cancer.
A team of four current and ex-firefighters are gearing up to ride 1,000 miles to raise money for cancer charities.
The nine-day challenge sees the group, known as The Four Amigos, cycle from Lands End to John O’Groats on Saturday.
Peter Haslam, Steve Horsley, Richard Beech and Steve Nutt make up the fundraising crew.
It comes after Mr Haslam’s son, Ted, was diagnosed with Burkitts Lymphoma at the age of three.
The toddler, from Sutton Coldfield, has been left confined to a wheelchair due to the stage 4 cancer.
Source: Firefighters to ride 1,000 miles for cancer charities