The 2026 Tour de France sent riders up Alpe d’Huez on back-to-back days. First came its famous 21 hairpins; the following afternoon, a punishing stage with roughly 5,500 metres of climbing approached the resort via the Col de Sarenne. That wasn’t an accident. The organisers had built two very different challenges around the same finish, illustrating something cycling fans know well: races are decided by much more than who has the strongest legs.
The route, the team around a rider, the weather and even a split second of bad luck can all change the outcome. Here are the biggest factors to watch, and why the pre-race favourite doesn’t always take the win.
The Course Shapes the Race Before It Starts
Every race route favours a certain kind of rider. The 2026 Tour route featured eight mountain stages, five summit finishes, a 19 km team time trial and an individual time trial. That balance mattered. More time trialling rewards powerful all-rounders; long summit finishes favour climbers; cobbles and gravel place a premium on bike handling and positioning.
That’s why teams study the route months in advance. It doesn’t tell them who will win, but it helps show which riders have the best chance.
It’s Never Just One Rider
Professional cycling looks like an individual sport, but few big races are won alone. Grand Tour squads have been limited to eight riders since 2018, and every teammate has a job: sheltering a leader from the wind, delivering food and drinks, setting the pace on climbs or chasing attacks. A well-supported contender can conserve energy while rivals are forced to work.
On a decisive mountain stage, pay attention to how many teammates are still there when the pace rises. That can tell you a lot about what happens next.
Crosswinds Can Decide a Race on Flat Roads
A stage doesn’t need a mountain to ruin someone’s chances. In crosswinds, riders form diagonal lines called echelons to find shelter. Get caught on the wrong side of a split and the time can disappear quickly.
On stage 10 of the 2019 Tour, crosswinds ripped through the peloton on what was classified as a flat day. Thibaut Pinot lost 1 minute 40 seconds to key rivals and dropped from third to eleventh overall. Other general classification contenders, including Rigoberto Urán and Richie Porte, also lost valuable time.
It was a reminder that on exposed roads, positioning and concentration can matter just as much as climbing ability.
Positioning, Crashes and Unpredictable Moments
The battle for a place near the front never really stops. Riders need to avoid crashes, stay with their teammates and be ready when someone attacks. But even perfect preparation can’t eliminate every risk.
At the 2024 Tour, Primož Roglič crashed around 10 km from the finish of stage 12, lost more than two minutes and withdrew the following morning. His legs weren’t the issue; one incident wiped out months of preparation.
That’s why teams put so much effort into keeping their leaders out of trouble, particularly through narrow roads, corners and nervous finishes.
Form Is Built Long Before Race Day
Professional racing is faster than ever. The 2025 Tour averaged 42.85 km/h, with one stage exceeding 50 km/h. Better aerodynamics, altitude training and more precise fuelling have all raised the standard, leaving little room for anyone who arrives short of their best.
Riders build towards a handful of key events, balancing training blocks, recovery and racing so they peak at the right time. Arrive exhausted or underprepared, and even the strongest team can’t make up for it.
Tactics, Breakaways and Reading the Odds
Then comes the strategy. Riders attack, teams choose when to chase, and temporary alliances can form and fall apart within a few kilometres. On flat stages, breakaways rarely survive: according to BikeRadar, their chance of success is around 2%, largely because sprint teams can organise a fast, efficient chase. Hillier stages are harder to control, giving attacking riders a better shot.
Those are the same variables that influence pre-race predictions. The cycling odds from BetUS, for example, offer a quick sense of which riders are expected to perform well based on the route, recent form and team strength. But they can’t account for everything: one missed split, poorly timed attack or crash can change the picture. For fans, comparing the favourites with what actually unfolds on the road can be interesting in its own right, without placing a wager. Anyone who does bet should do so only where legal and keep it strictly recreational; in the US, the National Council on Problem Gambling provides gambling support and a confidential, round-the-clock helpline.
Watching a Race With a Sharper Eye
Next time you watch a major race, look beyond who seems strongest. Study the route, watch which leaders still have teammates around them, and pay attention when the wind picks up or the peloton suddenly gets nervous. Consider which riders have timed their form for this exact moment, and who is making the smartest decisions under pressure.
The winner may still surprise you. But once you start noticing these details, you can understand not just who crossed the line first, but how the race was really won.
