Also most modern tractors can do c.30-40mph. I forgot this while out in Essex once and sped up because I didn't want to face the humiliation of being overtaken by a tractor. This is how I hurt my knee and ended up doing the Dunwich Dynamo in pain.
So if you are overtaking tractors at full pelt (especially those JCB ones) you're fast.
Also most modern tractors can do c.30-40mph. I forgot this while out in Essex once and sped up because I didn't want to face the humiliation of being overtaken by a tractor. This is how I hurt my knee and ended up doing the Dunwich Dynamo in pain.
So if you are overtaking tractors at full pelt (especially those JCB ones) you're fast.