Brompton Rollers With Fittings Rollers make it easy to tow your folded Brompton. We offer two types of rollers depending whether or not the bike has a rear rack. Rollers come fitted to new Bromptons, but you might be interested in a new set if you wear out the originals or if you want to upgrade the bike with these improved roller wheels, introduced on 2016 Bromptons. The first picture shows a pair of rollers for a Brompton with no rear rack The second picture shows four rollers for a Brompton with a rear rack Both sets come with all the fittings required