champion of the 1998 Tour de France, was able to make attack after attack to quickly tire out his opponents. Another type of rider or puncheur has a similarly small physique but possess more power which may provide an advantage in short but steep climbs in races including the Ardennes classics. Examples of such hills include the Mur de Huy in the Flèche Wallonne and the Cauberg in the Amstel Gold Race. Examples of such riders include Julian Alaphilippe, Philippe Gilbert, Paolo Bettini and Danilo Di Luca, who are able to sprint their way up the shorter climbs to win a stage or a single-day race. However, their lower endurance is a disadvantage in stage races where the climbs are usually longer, albeit at lower gradients. Many climbers cannot sprint very well because their relative small size does not allow them to match the strength of the bigger, more muscular sprinters. The last type of climber is the breakaway specialist who can ride aggressively with many attacks and sustain their lead over ascents, descents, and flats. Famous examples include Laurent Jalabert and Richard Virenque both of whom earned their King of the Mountains jerseys in the Tour de France by day-long breakaways amassing points at every summit. Most notably, Laurent Jalabert started his career as a sprinter but later transformed himself into a different type of rider. Rafał Majka won the Polka Dot jersey at the 2014 Tour de France and 2016 Tour de France in a similar manner. Many riders who are primarily time-trialists have also been able to compete in everything but the steepest climbs because of their good power-to-weight ratio. Tour de France winners Miguel Induráin, Jan Ullrich and Bradley Wiggins were primarily time-trialists but were also among the best in the mountain stages during the years in which they won the Tour de France. Also riders can build up a lead in the individual time trial's and defend the lead they have in the mountain stages, Tom Dumoulin won the 2017 Giro d'Italia and Primož Roglič won the 2021 Vuelta a España by doing this. Climbing physics and physiology Sports physiologists have attributed the advantage that small stature holds in cycling up steep ascents to the way in which body mass and body surface area scale according to height (see square–cube law). As a hypothetical cyclist's height increases, the surface areas of his body increase according