[Discussion] What dog breeds can run 20 miles next to a bicycle?

What breeds can be trained up to being able to do this? Can regular dogs like labradors be trained up to running this far at a pace of 15 mph? Are there breeds that can pretty much always do this?(All this assuming the dogs are old enough and have no hip dysplasia or other health issues preventing them from running a lot) via /r/dogs http://ift.tt/2rgDXdd