Lapierre pulsium 500 road bikerough roads and the unique challenges of the spring classics require a very special approach and the pulsium 500 endurance race bike is perfect for these as it has a serious trick up its sleeve enhanced comfortthe key to mastering the cobbles is shock absorption technology an elastomer connection between the seat and top tubes absorb and dampen impacts stopping them propagating through the rest of the bike and upsetting the handling this gives far greater comfo