I dont , use a custom made leather slip lead, one of them button ones (dont have a clue what the name for em is lol)
Simple they can catch on a fence/branch/wire.And break a dogs neck.atb. Catcher
but the dog is mostly on the lead when wearing a harness as it is running next to the bike, nor will the dog generally run off without being told and will call off....i supose that could happen if your dog was craply trained
Sorry dident know it was for to run along a bike.My dogs work in the field.atb.
my dog also runs in the field....but can also run three miles flat ou