Can you be done for speeding on a bicycle?

[revvingit]

If someone found a long private road and took their mountain bike for a ride down it, managed to get it up to 30-40mph when the speed limit was 15mph could they be prosecuted?

[revvingit]

InitialDave said:

On a private road? Isn't that trespass rather than anything relating to speeding?

If the land-owner permits access, no.

A private road is a road owned and maintained by a private individual, organization, or company rather than by a government. Nothing about who has access.