The chuck doesn’t have an air bleed but it fits easily and seals well, though storage for the hose is pretty poor.
Noisey pump action
There’s quite a heavy, solid feel to the Air Tower 4.
It’s reasonably well built but still feels a little plasticky compared to many of the other more luxurious pumps in this test. The pumping action felt rough and made a noise not too dissimilar to sawing through wood.
This did ease a little with use, but not much. The small gauge is top-mounted and 100psi has an extra red increment mark. Along with the marker bevel it’s very easy to read, if not the most accurate.
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Symon Lewis joined Cycling Weekly as an Editorial Assistant in 2010, he went on to become a Tech Writer in 2014 before being promoted to Tech Editor in 2015 before taking on a role managing Video and Tech in 2019. Lewis discovered cycling via Herne Hill Velodrome, where he was renowned for his prolific performances, and spent two years as a coach at the South London velodrome.
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