This is likely to be a problem with any track pump (I’ve not yet found one that fits), I tend to use a mini-pump with a hose on these wheels. The only wheel / valve I couldn’t get it to work on was on a child’s 20” wheeled bike where there’s not enough room between the spokes to fit the head. I’ve had no problem with getting a tight fit and no leaking whilst pumping. The massive cam lever on the head makes the pump really easy to attach and remove from your valves. The SwitchHitter II head does the job it’s supposed to do and has worked effectively on both Presta and Schrader valves. If you did want a pump that was more orientated to one end or the other of the volume:pressure ratio, Specialized do the Air Tool Floor Pump in HP (high pressure 252cc stroke volume, 145 psi max) and MTB (508cc, 40 psi max pressure) versions. But neither of these things have been an issue, the Air Tool Comp handles it all with ease. The downside of a do-it-all pump is that – relatively – you’ll need a few more pumps to inflate a gravel tire and a bit more oomph for higher pressures in a road tire than if you have a specific pump. As the variation was pretty consistent across pressures then it’s one that’s easy to adjust to. The gauge was really easy to read although, in comparison to readings from a Topeak digital gauge, were a little higher: Air Tool 40 psi = Topeak 35 psi, 60 psi = 54 psi, 80 psi = 73 psi. I’ve have also managed to seat tubeless tires with the Air Tool but not consistently. My MTB tires have pumped up quickly enough and I’ve had no issues getting my road tires up to the max 120 psi pressure the pump can handle. The Air Tool is really stable in use and pumping is quick and easy. They are always happy to help you with any questions you may have.(Image credit: Rachel Sokal) Specialized Air Tool Comp Floor Pump: The ride If you have any questions about shock pumps, hop on a call or a chat with one of our expert Gear Advisors today at 88. A progressive curve means that the suspension will act supple at the top of the travel and get stiffer as the fork or shock goes deeper into the travel. On most air springs, volume reducing spacers can be internally added to increase the progressiveness of the suspension curve. The lighter a rider is, the less PSI they will need in their suspension. A standard rear shock has anywhere from 150 to 300 PSI in it. A standard fork usually has anywhere from 50 to 150 PSI in it. A rear shock has a much higher leverage ratio working against it than a fork does. It is typical for a rear shock to have a much higher PSI rating than a fork. If you are letting air out of the shock, it is better to release it through the shock pump instead of releasing it through the exposed valve. You can adjust the shock or fork by adding or releasing air until your sag is correct. Sag should usually be set between 25% and 30% of the overall travel. Sag is the amount of travel the shock or fork goes into when you’re on the bike. Once you have the suspension set to the suggested pressure, you can sit on the bike and check your sag. Shock pumps are designed for precise and high-pressure air flow, so they have a very small air chamber. If you are pumping up the component for the first time, it’s going to take a lot of pumps to get it up to proper pressure. Whether you are setting up your bike’s suspension for the first time, or performing some trail side adjustments, shock pumps are always got to have around.Ī shock pumps threads onto the air valve of a fork or shock. To adjust these air springs, a suspension specific shock pump must be used. From rear shocks to forks and even some dropper seat posts, there are multiple key features on a bike that use an air spring. An air spring is lighter and can be adjusted easier than a coil spring. A large portion of modern mountain bike suspension uses an air spring as opposed to a coil spring.
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