Tour de France 2024 - Stage 2: Cesenatico - Bologna | 199.2 kilometres
The second stage begins flat as a board. From kilometre 76, however, there are some tough ramps awaiting the riders - third and fourth category climbs. In principle, this is puncheur terrain. Riders who can really hold on for a few minutes have the best chance of pulling away. Pure sprinters, on the other hand, will not like the finale, as the climb to the Basilica of San Luca has to be tackled twice at the end, a beastly hill with a gradient of up to 19 per cent at the top.
Aerodynamic material has an advantage on the approach to these ramps, that much is clear. But what does it look like on the Cote de San Luca, where the preliminary decision will probably come from a more or less large group?
What impact does the material have on journey times on this crucial incline? Our simulation provides the answer. We let the riders virtually slam into the climb and then up it in one go and analyse the effects on the riding times in the individual sections of the climb in fine detail.
Number of the day: 5 seconds
With the heaviest bike in the field, a rider loses five seconds on the Cote de San Luca compared to a bike weighing at least 6.8kg. Five seconds means a gap of around 30 metres at the end of the climb.
The (almost) entire field at a glance*
*) The calculations are based on the bikes tested by TOUR in the laboratory and wind tunnel. The bikes at the Tour de France may differ in some details. Of course, we have also not yet been able to analyse last-minute prototypes. Background to the simulation.
The simulation shows that bikes close to the minimum weight cluster at the top of the calculated journey times on the Cote de San Luca - which is hardly surprising. What is more surprising is that the time differences are not greater. But the gradient eases slightly twice and the uphill speed reaches over 30 km/h at times, so that aerodynamic forces are at work even on this steep cliff.
Slight differences at the top
The fastest bike in this scenario is the Specialized Tarmac SL8, four tenths ahead of the Giant Propel Advanced SL. The slightly lighter Giant TCR takes third place in our mountain simulation due to its weaker aerodynamics.
From the crest to the finish line, there are still 12.6 kilometres to go, mostly downhill and flat, with two small waves as counter-climbs. Given the distance, a lead of just a few seconds, which optimal cycling technique can provide, will not be enough to keep the chasers at bay. So technique is at most the tip of the scales, the legs are decisive.
In addition to engine performance, aerodynamics will again be the most important factor in the rest of the race. Should there be a group sprint, the same applies and the aero map will continue to be the deciding factor.
To summarise: If you want to compete for the stage win, you need a bike that is as light as possible at 6.8 kg and yet as aerodynamically shaped as possible.
Our expert
Robert Kühnen studied mechanical engineering, writes about technical and training topics for TOUR and develops test methods. Robert has been refining the simulation calculations for years and they are also used by professional teams.
