Rewrite this last part. 54x349?? What

My own experience as a longtime Brompton owner is that 349 wheels, and the Brompton, come into their own in heavy city traffic. I feel as though the bike could hold its own against all cars or other bikes. The wheels spin up to speed fast. You can weave well and cut through the traffic. Most of the time you are going between one light and the next in congested traffic. Downtown, Brompton is king.