Riding over the cobbles is a lot of fun – in a masochistic kind of a way – but it’s hard on both your body and your bike. The pros and their mechanics have plenty of tricks for tackling the pavé successfully and you could make use of some of them to add comfort to your own bike, whether you’re heading out to do a cobbled sportive or you’re just trying to cope with potholes at home.
Most big bike companies have an endurance road bike that’s designed to damp vibration and soften bumps more effectively than a standard road bike, and many of these make an appearance in the cobbled classics.
Trek, for example, has its Domane with an IsoSpeed decoupler that allows the seat tube, and therefore the saddle, to move independently of the rest of the frame.
Some new versions of the Domane also have a front IsoSpeed decoupler that allows a specially shaped carbon fibre steerer tube to bend slightly between the two headset bearings.
Loads of other framesets are designed to add comfort over rough and uneven roads: Specialized Roubaix (this is Mark Cavendish's Roubaix from a couple of year's ago pictured above), Cannondale Synapse, Giant Defy, Bianchi Infinito, Scott Solace, Merida Ride…
These bikes tend to offer a slightly more upright riding position than traditional race bikes, although the pros usually go for the lowest, most aggressive position possible.
John Degenkolb won the 2015 Paris-Roubaix on a 2014 Giant Defy Advanced SL, a frame designed to offer plenty of give with features that include skinny seatstays that attach to the seat tube at a very low point, and a top tube that’s designed to increase the frame’s compliance. On the other hand, Mathew Hayman won last year's race on an aero Scott Foil, a standard road bike but for the 28mm tubulars he used.
You might not have to cope with cobbles on your commute or your weekend ride, but a bike frame that’s designed to add comfort to your ride might still be a worthwhile investment.
Double handlebar tape
Many pro riders use a double-layer of handlebar tape for the cobbled classics. Doubling up helps to provide more cushioning from the vibration and also fills your palm more for easier grip. This is useful because all the bumping can tire your hands and forearms and make holding the bars much more difficult than usual.
Some teams, including Sky, also fit gel pads under the tape for even greater cushioning. Most of the padding is fitted to the tops of the handlebars although it’s also sometimes put on the drops too.
Doubling your bar tape is a lightweight and cheap way of adding comfort to your everyday riding. After the first time, it costs no more than using a single layer of bar tape because the inner layer is very unlikely to wear out (or, at least, it’ll require changing far less often than the outer layer).
Wide tyres, lower pressures
Most pro riders use 25mm wide tyres on asphalt these days and switch to something wider for the pavé.
A larger tyre increases the size of the cushion of air between you and the road and that’s important on the cobbles. The Flanders cobbles tend to be relatively uniform in size and well maintained – mostly – but in Paris-Roubaix… well, the size of the cobbles varies massively and there are holes all over the place so you’re in for a very, very rough ride. Wider tyres help.
Most riders use 27mm or 28mm tyres for Paris-Roubaix – FMB’s Paris-Roubaix 27mm tyres are everywhere – although 30mm tyres have become more common over the past couple of years too.
Teams are often cagey about the tyre pressures the pros use. I say 'cagey', they actually act like they're in MI6. A lot of work goes into getting the wheel/tyre combo right for the individual riders and they’re reluctant to say anything at all. We’ve asked the Team Sky mechanics about tyre pressure before, both on the road and on the cobbles, and they wouldn’t tell us a thing.
Judging from the info we have managed to glean, most riders will be riding at 5-5.5 bar (73-80psi) over the cobbles. That’s low compared to normal road race pressures because riders want the tyres to cushion the ride to avoid jolting, and to mould to the cobbles better.
Some teams say that they age their tubular tyres for several years prior to use in the classics because they believe new tyres tend to puncture more easily. The tyres are said to become more supple with age. According to the tyre companies we've spoken to, that's not true.
If you're heading to a cobbled sportive or if your local lanes are poorly surfaced, take a tip from the pros and fit some wider rubber, as long as your frame, fork and brakes provide enough clearance.
Many riders who don’t customarily use satellite shifters run them for the cobbled classics.
Satellite shifters allow you to change gear on an electronic drivetrain via a button rather than via the normal shift levers. Specialist climbers frequently have satellite shifters fixed to the top of the bars while sprinters often have them on the drops where they’re easily accessible when gunning it out of the saddle.
If you’ve never ridden the cobbles you might not realise why satellite shifters are a benefit here. It’s hard to explain just how ridiculously bumpy they can be. It’s nuts! Sometimes it’s really difficult to shift your hand position on the bars and occasionally it can be hard even to reach out to the levers with your fingers because you don’t want to compromise control.
By offering another gear changing option, satellite shifters can be a valuable asset on the pavé. Some riders even run satellite thumb shifters on the drops and more satellite shifters positioned up by the stem.
Satellite shifters might be a neat addition to your own bike if you’re lucky enough to have electronic shifting, but if your local roads are so bumpy that you need these shifters because you daren’t alter your hand position on the bars, you need to write a stern letter to the council!
Some riders change saddles for the cobbled Classics, going for something with more cushioning.
Team Sky’s Elia Viviani, for example, switches from a regular Fizik Arione to the Arione K1 with more padding. It's actually designed as a triathlon saddle.
Other riders prefer to stick with their tried and tested favourite.
A lot of pro riders use aluminium handlebars all the time – one of our contacts at Trek recently told us that most of the Trek Segafredo riders use a £30 Bontrager Race VR-C alloy bar for durability – and many of those who usually use carbon switch to aluminium for the cobbled races.
This is Mark Cavendish’s bike from a cobbled stage of the 2015 Tour de France, fitted with an aluminium bar from FSA.
There are several famous climbs in the Tour of Flanders, like the Koppenberg, Paterberg and Kwaremont, but Paris-Roubaix is relatively flat so riders tend to use quite a large inner chainring, usually a 44 or 46-tooth.
A larger inner chainring keeps the chain tighter so it’s less likely to get unshipped by bumps from the cobbles and pretty much every rider uses a chain catcher for more security.
Some teams use outer chainrings that are built stronger for the classics.
If you think you could do with swapping chainrings yourself, it’s a pretty straightforward job although you’ll need to adjust your front derailleur and perhaps swap your chain too.
It’s very easy for bottles to jump out of bottle cages over the cobbles. As well as losing drink, an escaped bottle is a hazard.
Many riders who regularly use lightweight carbon-fibre bottle cages switch to aluminium for the cobbled classics. Aluminium cages are more durable and you can bend the metal just a touch to provide more pressure.
Some teams put grip tape on the inside of their cages to provide more friction. It’s very easy for you to do this yourself if you have problems keeping your water bottle in place.
Extra brake levers
Although not all that widespread, some riders fit additional brake levers to the tops of the bars because they like to position their hands up there for the cobbles.
These are on Tony Martin’s bike from the 2015 Tour de France.
You’re unlikely to need these for normal road riding, although you might like to have them for riding in traffic, for example.
Team Lampre-Merida and Direct Energie riders used disc brake equipped bikes during last year's cobbled classics, and several riders have used disc brakes on the road since the reintroduction of the UCI's trial at the start of this season, so it looks likely that we'll see disc brakes on the pavé again in 2017.
Most teams use bikes from manufacturers that have disc brake models on the UCI’s List of Approved Models of Frames and Forks, among them Giant, Canyon, Specialized, Merida, Trek, and Focus. In theory, that means a large proportion of the peloton could be using disc brakes over the cobbles, although we'll just have to wait and see the level of take-up.
One of the key benefits of disc brakes is that they perform almost as well in wet conditions as they do in the dry. That could be a real benefit in a race like Paris-Roubaix which can quickly become very muddy if it rains.
Mat has worked for loads of bike magazines over 20+ years, and been editor of 220 Triathlon and Cycling Plus. He's been road.cc technical editor for eight years, testing bikes, fettling the latest kit, and trying out the most up-to-the-minute clothing. We send him off around the world to get all the news from launches and shows too. He has won his category in Ironman UK 70.3 and finished on the podium in both marathons he has run. Mat is a Cambridge graduate who did a post-grad in magazine journalism, and he is a past winner of the Cycling Media Award for Specialist Online Writer.