The following recommendations are from Pirelli for its TLR tubeless road tyres, but are good starting points regardless of the brand of tyres you’re using, providing you take the various factors we’ll run through later into account when going on to fine-tune tyre pressure. On a 21mm rim: lower pressure by 0.3bar / 5psi On a 19mm rim: lower pressure by 0.4bar / 6psi If you have a set of wheels with hookless rims, the maximum permitted tyre pressure may also be much lower than with hooked rims. These are typically printed on the tyre or rim sidewalls. Likewise, the optimum tyre pressure will be higher for heavier riders, or for riders carrying loads on their bikes, and lower for lighter riders.Īs a final caveat, it’s important to adhere to the pressure limitations set by the manufacturers of both your rims and tyres, particularly with regards to the upper limits. If the actual inflated tyre width is larger than the labelled width, the tyre will need slightly less pressure than recommended by these tables and vice versa. Helpfully, some tyre manufacturers offer pressure recommendations or pressure calculators for their range of road bike tyres, and we can take these as general starting points for dry days on smooth tarmac.Īs we’ll come on to, you should pay close attention to the actual size of your tyres when inflated because this can change optimum pressure for any given rim and tyre combination. Tools for the jobīikeRadar’s technical writer, Simon von Bromley, puts around 65psi in his 28mm tyres. Getting your tyre pressure right is both faster and more comfortable. Once you go past a certain point, adding more air to your tyres actually decreases grip, increases high-frequency vibrations and causes extra muscular fatigue. Very high tyre pressures might feel fast, but they’re not. If your tyre pressure is too high, the tyre will be so stiff your bike will begin to vibrate over imperfections in the road surface, negatively affecting comfort and wasting energy. It also increases the chance of pinch flat punctures. If your tyre pressure is too low, more energy will be lost in the deformation of the tyre casing and friction between the tyre and the road. Rolling resistance is the force resisting the motion of your tyres rolling on the ground. On a basic level, getting your tyre pressure right will make your rides easier, more comfortable and lower your chances of punctures.įrom a performance standpoint, optimising tyre pressure is critical to reducing rolling resistance and improving comfort. If your tyre pressure is too low, you could pinch the tyre against the rim, causing a puncture or damaging the wheel. Key points to considerīefore we get stuck into the details, here are four key things to consider when it comes to road bike tyre pressure. We’ve also got a guide to tubeless setup, if you’re considering making the switch, and buyer’s guides to the best road bike tyres and best tubeless tyres if you’re looking for new rubber.
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If you’re just starting out, we’ve also got an explainer on how to pump up a bike tyre, as well as a guide to inner tubes, with everything you need to know about tube sizes, valve types, materials and so on. In this article, we’ll run through why tyre pressure is so important, what factors influence finding your optimum pressure, and how you can find a pressure that works best for you. But you also need it low enough to absorb, rather than bounce over, imperfections in the road. You need your tyre pressure high enough to minimise energy losses from the deformation of the tyre and to offer predictable handling through corners. So, how can you find the right tyre pressure for your bike? In essence, it’s all about finding a balance. Whether you’re just starting out or you’re an experienced rider looking to optimise performance, we’re here to help. Ultimately, the pressure you need to run will vary depending on the rider, bike and road conditions, but it’s fairly easy to get into the right ballpark.
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