If I drive my small family hatchback to my local tyre emporium (blue and yellow logo, rhymes with ‘chick flick’), a heavily tattooed guy rocking bulging muscles and an impressive beard will charge me as little as £49 a corner to fit it with new ‘boots’.
Yet, if I pop three doors down to my local bike shop, an impossibly skinny guy sporting a very lively moustache will charge me as much as £160 for two tyres, plus £25 each end for fitting, excluding valves and sealant. Come October, he’ll want me to switch to winter tyres too, which is almost as ruinous.
Of course, I’m comparing budget car tyres with high-end bike tyres. Realistically, I’d expect to spend about £75 to £100 per wheel to reshoe my lowly hatchback, a figure that buys me tyres stamped with a trusted brand name that I recognise. My neighbour, who is fortunate enough to own a Porsche Taycan, will suffer the misfortune of paying about £1,200 when the time comes to replace its first set of tyres.
Similarly, a quick internet search reveals numerous budget bicycle tyres from reputable brands available for as little as £20, proving that cycling can be enjoyed even when funds are limited.
Nevertheless, the cost of a 28mm performance bicycle tyre doesn’t appear to compare favourably with a 295mm performance road car tyre, so what gives? Why are performance bike tyres so expensive?
High-end Pirelli performance tyres, such as the new P Zero Race TLR undergo significant, complex R&D.
(Image credit: Pirelli)
To some degree, it’s because the compound formulation is superior. Bicycle tyres have comparatively little tread, so expensive additives can be included without pricing these premium products out of the market. If road car tyres – even those destined for expensive sports cars – included a similar proportion of high-end ingredients, they would prove too costly for consumers, even wealthy Porsche owners, to stomach. To put this into perspective, Formula One race tyres cost about three times as much as those on my neighbour’s Taycan because, at that level, the teams are solely focused on podium positions, not pennies.
“It is not just the size of the tyre that’s relevant, but the performance it has to deliver,” explains Samuele Bressan, head of global marketing at Pirelli. “For example, a truck tyre can use a lot of rubber, but the performance demand is generally very narrow, primarily good wear characteristics. However, when designing a tyre that requires a lot of material, one that must perform well in multiple conflicting areas – speed, grip, and mileage – and is to be sold within a defined market price range, then you’re forced to take account of the cost of the chemical ingredients.”
Premium bicycle tyres may be expensive, but they don’t require much tread, so they haven’t reached a level where Bressan and his colleagues must consider skimping on expensive additives.
Chemical materials, as well as laboratories and the personnel working within them, are shared across all divisions
Samuele Bressan, Pirelli
“Chemical materials, as well as laboratories and the personnel working within them, are shared across all divisions,” confirms Bressan, “from F1 to passenger car tyres, motorcycling and cycling.” Cycling, it seems, is no poor cousin.
Continental is another brand that pools R&D and material sourcing across its product divisions. “The production quantities for bicycle tires are smaller than for car tires, enabling us to use more ‘innovative’ materials and/or use different production processes,” says Hannah Ferle, Road Project Manager, Continental. “We benefit from the purchasing strength and material experience from other tyre departments, and on the raw material side, we can ensure that we have the highest grades of base materials available.”
Grip vs rolling resistance vs wear conundrum
Grip when you need it most, but at the expense of rolling resistance?
(Image credit: Future)
It’s relatively easy to develop a grippy tyre, just as it’s not particularly difficult to create one that rolls well or resists wear. However, developing a tyre with all three characteristics is immensely challenging because each quality can compromise the effectiveness of the others. Simply put, good grip requires a softer compound, which adversely impacts rolling resistance and wear.
To counter these effects, manufacturers experiment with the compliance of the tyre and include additives in the rubber compound, such as Carbon Black, Silica and Graphene.
“Developing a tyre with excellent grip, rolling resistance and wear characteristics is complex to achieve,” says Bressan, “so we begin by considering the compromise we’re willing to achieve and the best way to arrive at it. For example, do we investigate the qualities of a flexible casing with a rigid compound, or vice versa?
“Even a single feature like grip can be achieved in different ways – mechanical grip provided by a rubber that flexes a lot and so conforms very well to the surface vs a pure chemical grip that maximises the amount of friction at a single contact point of the tyre’s footprint. Similarly, for wear, it can come from pure abrasion resistance for road applications, or from resistance to tearing for off-road applications.”
High-performance bike tyres are made from a complex mix of rubber and chemical additives.
(Image credit: Pirelli)
To simplify this complexity, the technicians at Pirelli select chemical components based on the specific functionality they need to provide, before optimising how effectively they work together by adjusting their chemical affinity. This, says Bressan, is where expertise in polymer technology is critical.
“Carbon Black and natural rubber provide mechanical reinforcement to the polymer matrix, but they do so with slightly different behaviours,” says Bressan. “They have different chemical affinities to other polymers that are necessary, for example, to increase the wet grip – affinity with water molecules – or decrease rolling resistance – less hysteresis while deforming (the lag a tyre experiences when returning to its original shape).
“Silica is also a reinforcement,” continues Bressan, “but with a much higher affinity with water, so, for example, it allows you to reduce the use of some other chemicals that add wet grip, but it carries compromises in other areas.
“Graphene is yet another reinforcement, one that carries better air retention and generally thermal and electrical impermeability, very useful in some rubber applications, less in others – it depends on the performance being targeted.”
Bressan explains that a recent trend in polymer technology is to functionalise existing molecules by adding new characteristics. For instance, enhancing the water affinity of a Carbon Black chain by incorporating additional polymer chains or fragments into the molecular structure. Furthermore, his colleagues in Pirelli’s labs are consistently searching for entirely new chemicals that provide improved performance in specific areas.
The tread pattern on the Pirelli P Zero Race RS is designed to improve compliance, which in turn enhances grip.
(Image credit: Pirelli)
Moving away from complex chemical formulations, even the subtle tread patterns cut into some road tyres are there to maximise grip and rolling resistance, particularly when less compliant compounds are specified.
“Contrary to popular belief, these patterns are not there to expel water since bicycle tyres are too narrow to aquaplane below about 100kph,” says Bressan. “The grooves and cuts on road cycling tyres are included to enable the rubber to move. The rigidity or flexibility of the tread can be achieved either by formulating a soft rubber or by cutting grooves into a more rigid rubber.
“Once again, the grooves are a factor within the chosen target performance that contributes to flexibility, allowing for the rubber formulation to play more in favour of other features. It is a choice made when the target usage of the tyre is determined.”
The new Pirelli Cinturato is a performance endurance tyre, with different characteristics to the race-oriented P Zero RS.
(Image credit: Pirelli)
Clearly, there’s much more to performance bicycle tyre development than meets the eye. But is tyre choice really something that amateurs should be overly concerned with? After all, isn’t aerodynamic drag the real biggie when it comes to real-world performance? Ferle has an interesting take on this.
“Rolling resistance remains constant regardless of the speed, whereas aerodynamic drag increases exponentially at higher speeds,” says Ferle. “Meaning that, for ‘normal’ cyclists, rolling resistance has a higher impact than for pro cyclists, where the aerodynamic drag can have a 10x higher impact than rolling resistance.
“Nevertheless, whether you’re a pro or hobby rider, you should keep other performance parameters in mind when choosing a tyre. Puncture protection is important – nothing is slower than having a puncture – as is weight, which is something you can definitely feel, especially uphill or when accelerating/sprinting, and, of course, grip. If you base your tyre choice solely on rolling resistance, you might end up with a tyre that is fast in a testing lab but not a lot of fun to ride in the real world.”
Cold climate advantage
Winter tyres improve grip in colder weather, not just puncture resistance.
(Image credit: Future)
I’ve often resisted fitting winter tyres, believing they offer little more than increased puncture resistance at the expense of weight and speed. It turns out, they could be the faster option.
“The biggest differentiating factor,” says Bressan, “other than puncture protection, which is generally higher, is the working temperature. They are formulated to remain flexible at lower temperatures, providing increased grip and an improved footprint. This boosts cold-temperature, wet-weather performance measurably.”
Optimising your setup
Maintaining the correct tyre pressure will enhance grip and speed – it’s free too!
(Image credit: Getty Images)
The benefits of investing in high-performance tyres can be quickly undermined if they are incorrectly set up or if the system is poorly maintained. Fortunately, optimising your tyre setup is inexpensive and straightforward, though often overlooked.
“The most important advice,” says Bressan, “is to select the correct tyre for the purpose – consider the majority of the riding that you do and base your tyre choice appropriately.
“Secondly – and this is most neglected – optimise your tyre pressure. It is, after all, free speed. Ensure it is right for both your weight and use case, which may mean adjusting it for the ride you are about to undertake, even if your weight remains unchanged. A long and wet ride will likely demand different pressures to a short, fast outing on smooth, dry roads.
“If using tubes, buying the highest performing ones you can afford is a very cost-effective upgrade – usually TPU. Even if they initially appear expensive, they are, along with tyres, the most effective cost-per-watt upgrade you can make.
“If you run tubeless, whatever sealant you put in, keep it moving so that it stays liquid and doesn’t clog to one side of the wheel, unbalancing the whole system while failing to provide puncture protection.”
When it comes to tubeless vs. TPU, Ferle is a strong advocate for cyclists riding with the setup they feel most comfortable with. Like Bressan, she cites the most important consideration to be: “Pressure, pressure, pressure!”
A worthy investment
A curing press at Pirelli’s high-tech Bollate factory in Italy.
(Image credit: Pirelli)
Why are bicycle tyres so expensive? Arguably, this is a false assumption. Plenty of low-cost budget tyres are available for commuting and general riding, many from the major brands.
If, however, performance is important to you, it’s worth remembering that you are investing in a high-tech component that has required an immense amount of R&D and contains a potent formulation of advanced ingredients. Bressan reckons that chemical technology evolves significantly over a three-to-five-year period, so today’s generation of tyres will be superior to those available to Froome when he last climbed the Tour de France podium back in 2018, taking third.
“A Continental tyre from 1995 is in no way comparable to one today,” concurs Ferle, “but you would also see differences between a tyre from 2020 compared to 2026.”
So, paying £80 for a tyre may be expensive, but the performance advantages it affords compare very favourably with splurging £2,000 or more on a fashionable set of wheels. After all, it should remain your only contact with the tarmac!
