Precision is how repeatable your darts are. If you aren’t always hitting the 20 but you can tightly cluster your darts, you are inaccurate but precise. Similarly, if you hit left of bullseye, bullseye and right of bullseye, your average accuracy would be good, but your precision would be bad.”

RockShox - Shock Parts - TF Tuned RockShox - Shock Parts - TF Tuned

At 284g and 250mm long, it’s an impressive combination of two pumps, especially given so many mini tyre pumps do without a gauge. If you’ve ever used a low-quality pump, you know how unpleasant the experience can be. You may feel like the pump could break at any moment. I analogise it to throwing darts: accuracy is how close you are to the bullseye, so for a gauge, how close is 100psi to 100psi? However, it requires fewer strokes to inflate the pressure you need, making it ideal for mechanics in a workshop.This is always a personal adjustment”, says Cancellier, “dependent on your air pressure — rebound is trying to control the force of the air spring returning to full extension.” For more aggressive riders, I recommend one or two tokens at 160mm”, explains Cancellier. “For each 10mm decrease in travel, I add one token. For example, 150mm would be two or three tokens, 140mm three or four tokens etc.” PSI is a unit of pressureexpressed in pounds of force per square inch of area. It stands for Pounds per Square Inch. A larger volume is easier to bottom-out, a smaller volume will ramp up more towards the end of the stroke. Finance is subject to application, financial circumstances and borrowing history. Performance Cycling Limited FRN: 720557 trading as Tredz are authorised and regulated by the Financial Conduct Authority. We are a credit broker not a lender – credit is subject to status and affordability and is provided by Mitsubishi HC Capital UK PLC. Terms & Conditions Apply.

RockShox Air Pump (300 Psi Max/High Volume Convertible, Black

If you’re always hitting the 20 but you can tightly cluster your darts you’re inaccurate, but precise. Similarly, if you hit left of bullseye, bullseye and right of bullseye, your average accuracy would be good, but your precision would be bad,” he said. “For pressure gauges, accuracy is a combination of design and manufacturing of the internals, followed by a careful calibration to make sure that 100 = 100.” Also, some riders prefer a slightly faster fork while others a slower one. Whichever you prefer, you should aim to have the fork returning in a controlled manner that isn’t so fast as to return violently, or excessively slow.” Because it’s still quite compact, we found that it does take a while to inflate a tyre but is great for suspension setup since you can use the high-volume setting to initially boost a load of air into your fork, then the high-pressure setting to fine-tune it. We managed to get about 70psi in 20 strokes. You do have to hold the dial at the front but rubber coating makes that comfortable, though it is possible to get your fingers trapped under the handle – hold the handle to the side, and it’s fine. When installing the tokens, ensure you thread them securely into the top-cap and the adjacent token. Were they to come loose, they could jam inside the fork.Without a body, the pump wouldn’t exist. With this, look for a pump that offers a comfortable hold and a durable material. Aluminium is a popular choice here for weight, strength and corrosion resistance. Handle

Bike Shock Pumps | Free Delivery* | Tredz Bikes Bike Shock Pumps | Free Delivery* | Tredz Bikes

To learn more about the issues with gauge accuracy and precision, we consulted Josh Poertner, the CEO of pump manufacturer Silca. The pump itself is solid, with a bleed valve, extra-long hose and comfy handle, though it has quite a small volume so 100 strokes equates to about 81psi. If you want both pumps in one, this is simply your one and only good choice. It’s also the only pump on test to include an under bottle-cage mount – in case you’re keen to get it covered in mud.

RockShox High-Pressure Fork/Shock Pump - 300 psi Max Extra Info

One common argument is whether air is released from the suspension when the pump is disconnected, or if it’s just air escaping from the pump. Thus, heavier riders running higher air pressures will likely require more rebound damping than lighter riders. Each pump was assessed on its general usability, comfort and build quality. Additionally, we recruited Brady Kappius to custom-build a high-accuracy inline gauge to ensure repeatable results in our testing. With this, our benchmark digital gauge offers 1 per cent verified accuracy. Easily the most efficient pump that we’ve tested, and one that outperforms its price. The mechanical isn’t quite as accurate as a digital pump, but it has a bigger range being rated to 400 psi.

Front Suspension - SRAM Front Suspension - SRAM

With such high pressures, you’ll want a comfortable handle. Some pumps feature a fold-out handle, others offer little to grasp onto. Hose Reasons to buy: Presta adapter means this pump works on tyres and suspension, high pressure and high volume modes, neat design, frame clip included, compact size On the downside the pump isn’t very comfortable to use since you have to grip around the gauge and the handle has quite a blunt shape. There is a very non-linear relationship between accuracy, precision and cost,” he explains. “Accuracy and precision are different. To counter such issues, Poertner suggests that whatever you choose to buy, you should treat it as a reference.With that, see our next point. 4. Gauge accuracy doesn’t matter so much, but repeatability (precision) certainly does Some pumps claim to have special valve heads that isolate attachment and the valve pin engagement; others don’t say much about the fact.