About Tire pressure bike calculator
Jump to:Pump it up. Check your bike tire pressure regularly.Find the sweet spot.Don’t overinflate. Adjust according to tire volume.Beware of the floor pump. Play with different pressures. The single biggest performance improvement you can make on your bike isn’t a lighter set of wheels or fancy electronic shifting. In fact, it isn’t an upgrade at all—and it doesn’t have to cost you more than some time and, maybe, as little as what you’d spend on a new roll of handlebar tape. It’s bike tire pressure. If you don’t pay attention to inflation, the amount of air in your tires is probably not only not ideal but wrong enough to cause excess flats and serious drop-offs in performance and comfort. Here are our experts’ top tips for finding the perfect bike tire pressure. Pump it up. Proper tire pressure lets your bike roll quickly, ride smoothly, and avoid flats. Narrow tires need more air pressure than wide ones: Road tires typically require 65 to 95 psi (pounds per square inch); mountain bike tires, 15 to 25 psi; and gravel tires, 25 to 40 psi.In the past, to find your ideal pressure, we would recommend you start in the middle of these ranges, then factor in your body weight and experiment by going higher or lower until you find a pressure that works for you. But as research into tire pressure has ramped up with the advent of tubeless tires in the last few years, our knowledge of tire pressure has gotten more complex, and so have the formulas for getting to that magic pressure number. Today our recommendation is for you to skip the rule of thumb guessing game and go straight for a reputable tire pressure calculator. The two best options, that I've found, are calculators from Zipp and Silca. Both of these calculators will ask you for some basic information such as your combined weight with your bike and gear, your measured tire width, wheel diameter, type of tire, and the surface you are riding on. Then they'll spit out a tire pressure recommendation based on your inputs. ZippHere is what Zipp recommends as a road bike pressure for someone weighing 150 lbs with an 18 lb bike. SilcaHere is Silca’s recommendation for the same rider. As you can see, each will deliver a slightly different pressure recommendation and for the most part, I would recommend splitting the difference between them for a good starting point.Because both calculators ask for slightly different information, one might be more accurate to your situation than the other. For example, the Silca calculator allows you to very precisely select speed and surface conditions ranging from an indoor track all the way to Category
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4 Gravel. The Zipp calculator, on the other hand, allows much more precise inputs for things like inner rim width as well as the type of rim you are using. Zipp's calculator generally gives a lower tire pressure recommendation (compared to Silca's) and has a specific option for hookless rims, which have much lower 72.5 psi maximum tire pressures than traditional hooked rims. Never go above or below the manufacturer’s recommended tire pressures, which are listed on the sidewall as well as on the rims. If there is a discrepancy between the two, we recommend going with the lower number. Check your bike tire pressure regularly.Tires leak air over time. A properly set up tubeless tire, and tires that use butyl tubes (the most common type), leak far less than lightweight latex tubes. But air seeps out of all tires, from as little as a few psi a week to drastic drops overnight. And the rate of loss increases with pressure and in reaction to outside factors like lower temperatures (about 2 percent vanishes for each 10-degree dip in Fahrenheit). Some of us at Bicycling check out tire pressure before every ride, some once a week. The important thing is to develop and stick to a habit of regular checkups and top-offs that works for you—if you don’t, your pressure is probably wrong most of the time you ride. And always check the pressure the day after you repair a flat with CO2 canisters. Carbon dioxide is highly soluble in butyl rubber (nitrogen and oxygen, which make up 98 percent of our atmosphere, are far less so), so it basically permeates right through the tube wall, and fast. In fact, if you flat early on in a ride and fix it with CO2, check the tire again after an hour or so—it will probably need topping off. 4 Pumps We LoveLezyne Pressure Over DriveLarge air chamber seals tubeless tires quickly.Specialized Air Tool ProNow 25% OffA high performance floor pump with an all metal construction. Silca Silca Gravelero Mini PumpMore air per stroke helps get tires pumped up faster. Pedro's Prestige Floor PumpSteel construction, dual head, 160psi max.Find the sweet spot.Tire pressure isn’t a set-it-and-forget-it thing. Traditional wisdom says that higher tire pressure equals lower rolling resistance because, on a smooth surface, hard tires flex less and create a smaller contact patch. But no road is perfectly smooth. Properly inflated bike tires conform to bumps and absorb shocks. Overinflated bike tires transmit impacts to the rider, which sacrifices speed and riding comfort.On new pavement, your tires might feel great at 100 psi, but on a rough road, they might roll faster at 90 psi. In wet conditions, you may want to
