Link: http://HarborFreightReviews.com

Item: Tire Chuck with Clip
Item number: 46788/42443?)
Retail Price: $0.77 (hum, this is interesting!?)
Target price: $0.99
Item Link

Whenever I use to inflate my bicycle tires, I was constantly adding a bit of air, checking the pressure with a tire pressure gauge, and then adding a bit more until I finally reached the desired tire pressure. (I often found it more convenient to over-inflate the tire and let out a bit of pressure.) Sure, I could use one of those tire chucks with a built-in pressure gauge, but I've always found these to be inaccurate or unreliable at best. With most compressors, the air output pressure can be limited by a simple dial set with a built-in pressure gauge. This provides an easy method of making sure that your tires are inflated to the proper pressure each time without constantly removing the inflating chuck and manually checking the tire's pressure: simply preset the maximum air pressure output to the desired tire pressure. This is especially helpful with high-pressure, low volume bicycle tires which are easy to over inflate and possibly blow.

So why would you want a clip-on tire chuck for quickly inflating tires? Well, it's real simple: set your compressor pressure output to the desired inflating pressure and bingo, you have a quick and easy, fool-proof inflation to the high pressures used in bicycle tires. My road bike likes 70psi, while my winter bike uses 55 psi inflation pressure. I keep my small, hand-portable compressor near my bike stop at the front door and top up the tire pressure frequently during my rides to ensure easy pedaling. Turn on the compressor, attach the clip-on tire chuck, and come-back when it's inflated. (FYI: My small compressor slowly leaks air from the tank, so it usually requires a few minutes running time each day to reach the relatively high pressures used for inflating bicycle tires; hence, the "attach the clip-on chuck and come back" a few minutes later when the compressor has reached the proper pressure and inflated the first tire.)

Of course the output regulator on a compressor is not as accurate as a tire pressure gauge, so you might want to adjust the actual setting on the compressor to match the desired tire pressure measured by a hand-held gauge. And the pressure output on the compressor may vary by a few psi from day-to-day, but we're not talking about rocket science here, simply keeping the tires topped up to (around) the proper pressure. There is a big difference pedaling 10 or more psi under pressure, and this convenient, no-brainer for keeping the tires inflated makes a big difference in my daily compute to work.

FYI: I'm pretty much non-functional in the morning, so trying to read a tire pressure gauge while navigating my first cup of coffee is an arduous task, likely to blow the tire off the rim if I'm not careful. Presetting the compressor output to the desired tire pressure, turning on the compressor and attaching the clip-on tire chuck is easy enough for even me in the morning and it keeps my tires inflated to the proper pressure, thus minimizing the energy required for my morning commute.

Bottom line: A must have item for the cyclist and others frequently inflating tires to preset pressures. Provides a quick and easy method to reach preset tire inflation pressures without constantly checking with a pressure gauge!