Watch as the cyclists speed along the road.
Police have urged cyclists to watch their speed and to think about how it could impact them in a crash after a group was spotted doing nearly 40mph in a 30mph zone.
Video footage shows the cyclists travelling in a group on Dartmoor.
Devon and Cornwall Roads Policing Team took to social media to express their concerns.
They said: "Cyclists, please be mindful of your speeds and just how this will effect you in the event of a collision.
"This group today on Dartmoor observed travelling at near 40mph on a 30mph restricted road."
The group was stopped and "offered appropriate words of advice".
Speed limits are designed for motor vehicles so you can’t normally be charged for speeding on a bicycle.
There are various bylaws in place that could impose speed limits on cyclists.