The cobblestones of Northern France and Belgium are world-famous.
A fame that is, admittedly, shared a bit with our Parisian friends from the Montmartre hill since Wout Van Aert‘s victory in the Tour de France under the rain.
They represent a unique challenge for any cyclist, and that’s what we love: challenges. Unstable, irregular, and slippery with rain or dust, they require a very specific technique to be crossed efficiently, but never comfortably. Here, we’ll talk about suitable equipment, handling finesse, and overall attitude on the bike.
An adapted position to absorb shocks
The first key to riding efficiently on cobbles is to adopt a flexible position while keeping your core very tight. Don’t relax here; it’s crucial to stay dynamic. Your arms, however, should always be slightly bent to act as natural shock absorbers.
Being tense and trying to grip the handlebars too tight is a guaranteed way to be rigid and amplify vibrations, and therefore fatigue. Keeping your hands on the tops allows for a bent-arm position and thus good shock absorption, but it can be problematic if you need to brake suddenly. Hands in the drops is ideal for being on the attack and having the brake levers under your fingers. It’s certainly less comfortable for the neck, which acts as a second shock absorber after the arms.
After the arms, the hands must always be relaxed and sometimes “let go” of the steering where it wants to go; trying to constantly correct your line is a source of stress and tension. Strangely, you get the feeling that the back of the bike guides the trajectory—it’s on the cobbles that you realize this. And of course, at the risk of disappointing Tom Boonen, wear gloves to avoid friction and blisters on your palms.
Next, your pelvis should stay slightly back on the saddle, with weight distributed evenly between the front and back of the bike. Too much weight on the front will make steering imprecise, while too much on the back will limit front-wheel grip.
Finally, the legs: they allow you to push a big gear and press hard on the pedals to maintain speed. It’s a “track cyclist” or sprinter effort that needs to be repeated at every cobbled sector. Having big thighs is an advantage.
The particularity of riding on cobbles uphill is also a technique to master for the Flandrian classics. If you have enough speed and a good cadence, you’ll bounce over the bumps, the back wheel will jump, and you’ll be tossed left and right, but you’ll get through on grit with your heart rate at the max. If you take it slower, almost in “trials” mode, you’ll get through by keeping your body weight on the front of the saddle with very relaxed hands—but be careful not to come to a standstill, because you won’t get going again given the slope and lack of grip.
Obviously, all of this is amplified in the rain… Climbing the Koppenberg or the Paterberg in wet weather becomes an almost insurmountable challenge. Want to try?
Choosing the right line: every man for himself!
On the cobbles, there are only 3 or 4 rules.
1/ Because the roads are “crowned” due to agricultural machinery passing through, the crown of the cobbles remains the line that offers no surprises and keeps you straight. It “beats you up” hard, but it always works. If by bad luck you get pulled toward the gutter—because it’s slippery, for example, or a competitor brushes past you while overtaking—you have to try to correct your line, but you always lose a bit of speed.
2/ The side of the road is tempting because it’s often smooth, a bit like a gravel path. But they collect gravel and loose cobbles that have detached from the road, sometimes sharp ones, so there’s an increased risk of punctures or crashes. In the rain, avoid this at all costs because the water prevents you from seeing where you’re putting your wheels.
3/ Keep your eyes far ahead! If you look at your front wheel, you won’t anticipate the end of the sector, you’ll slow down, and you’ll be at the mercy of the road. Look far ahead and your brain will memorize the areas to avoid. You have to tame the road and focus on your high speed, posture, and cadence. Trust your bike; it won’t break. It will vibrate and shake as much as you do, but it won’t break.
4/ Take corners as fast as possible without leaning too much or over-angling. It’s subtle, but since grip isn’t your ally, you need to lighten the front of the bike so you don’t put too much pressure on the bars and slide out. Conversely, pushing too hard on the pedals will make the rear wheel wash out and cause a “spin-out.” You need to pedal “round” without jerking, keep your eyes on the exit, and sometimes take a very wide line to round off the corner angle so you don’t have to lean too much.
Which bike? Which tires?
The rider’s technique on the bike is paramount, as we’ve just seen.
Equipment plays a very important role. Slightly reduced tire pressure improves comfort and grip by allowing the tire to conform to irregularities. Wider tires are also recommended for a “balloon” effect and better shock absorption. A gravel bike combines these advantages, but be careful as it’s often heavier with very wide tires for road sections. In short, it’s all about nuance and compromise. A cyclocross bike is also a good alternative. Your choice of gearing should allow you to maintain a smooth cadence without over-exerting yourself. Smooth pedaling limits muscle fatigue and promotes better control. At Paris-Roubaix, the small ring is never used, unlike the Tour of Flanders and Gent-Wevelgem.
In summary, a road bike with 28 to 32 mm tires, set up tubeless to reduce pressure, is ideal.
Otherwise, your usual bike will do just fine, don’t worry—even with inner tubes pumped up fairly hard to avoid pinch flats. You’ll feel the bumps of the cobbles a bit more, but you’ll make it to the end with a smile.
Overall attitude
Mental posture is decisive. Cobbles require concentration, but also relaxation. You have to accept the vibrations and go with the movement rather than fighting against it.
With experience—by following the wheel of a local cyclist, for example—you develop reflexes that make these sections less intimidating. Riding the Flandrian cobbles is a demanding exercise, but extremely rewarding. By combining a flexible position, good terrain reading, and smart speed management, you turn this difficulty into pure pleasure. With a bit of practice, the cobbles will no longer be an obstacle, but a unique playground.
2 of the 5 Monuments of world cycling are based on cobbled roads. There’s no mystery there. It’s something to do at least once in your life as a cyclist, with LASTCOBBLE.