Pro Bike Tool CO2 Inflator Quick & Easy - Presta & Schrader Valve Compatible - Bicycle Tyre Pump for Road & Mountain Bikes - Insulated Sleeve - No CO2 Cartridges Included

Excellent product. Love the fact that you can control how much air is dispensed. Turns on and off quickly with a twist of the handle. Nice foam wrapper prevents freezer burn for CO2 cartridge. Fits nicely in my pocket! Best one out there in my opinion!

UPDATE (10/05/17)=============================After owning this product just over a month, I have no complaints, only praise. Because of its compact size and ease of use, Pro Bike Tool's CO2 Inflator remains a valued part of my bike maintenance program.STICKING VALVE: In my original post I mentioned difficulty getting the valve to open. That issue has NOT repeated; the valve has worked perfectly every time I use the inflator, which is almost every day.CARTRIDGE LIFE: the other question I had regarding this product was how long a cartridge would last once screwed into the inflator. It does appear to lose CO2 over time, but I would call this loss negligible, losing perhaps 10 PSI over a 7-day period. So it's not a perfect seal, but at just under $1/cartridge, it's manageable and acceptable.REVISED RATING: Product continues to live up to its previous 4.75 star review, and as the sticking valve issue has resolved, I revise my rating to 4.9 STARS. HIGH RECOMMEND.ORIGINAL POST========================Disclaimer: I've only owned this product for about 2 hours at the time of this writing. Please check back for progressive updates.SIZE/CONVENIENCE: 5 Stars. Excellent PerformanceI am fanatical about tire pressure, generally, and specifically, for my motorcycle which is my sole transport (Ah, SoCal). So, the first commendation for this product is its size. The whole thing, plus a couple (or 3) extra cartridges fits into a sidepouch of my daypack. Spacewise, VERY economical. Are you a purist bicyclist? The whole setup weighs maybe 7oz (Unit + 1 cartridge) and shares the dimensions of, say, a pack of cigarettes. Please don't smoke.OPERATION: 4 1/2 Stars. Above Acceptable PerformanceEasy to operate, and to understand how to operate. Device mounts to tire (Schrader valve) as advertised (both Bike and Moto tires). Cartridge mounts to device as advertised. Delivers C02 gas to tire as advertised, with a * (see below). Here are my results: A single 16g cartridge took my mountain bike tire from 17psi to 41.5 psi, AND my motorcycle tire from 30 to 36psi. Total psi output from 1 cartridge: about 30 psi. There have to be lots of environmental factors than can grossly affect that result. For instance, the bike tire was inflated indoors/78F while the moto tire was outdoors/100+F. Would that affect performance? Someone out there must have that answer.* The reason the Operation eval only gets 4.5/5 stars is because the valve got stuck in the off position after I swapped in a new cartridge. So tightly closed I was about to go get a pair of pliers to get it to open when it finally gave in to extreme hand pressure. Yet another environ factor mitigating operation? Who knows, but you might want to check back here for updates to see if it is a persisting problem.ADVICE/TRICK: Make sure the cartridge is screwed in fully. I thought I had done so, but was getting a relative trickle of air coming out the valve. In fact, thought cartridge might be spent. So I gave the cartridge another tightening twist, just in case, and upon re-test the air blasted out as one would expect. Word to the wise, and a suggestion for those interested in tweaking air flow delivery.OVERALL: Highly Recommend with a combined rating of 4.75 stars.Look for an update to this review in about 30 days (including, for instance, how long a partially full cartridge lasts while attached to the device when not in use)

Works perfect easy to use

Absolute life saver. Works great when your in a pinch, 15 miles from home at 4 am. You either start walking in your cycling shoes, or call the wife and wake her up at 4 am. Neither is a viable option, so your only choice is to get that tire fixed. I ride 20 miles every morning before I get my day started, and I am one of the lucky ones that just do not get flats very often, but on the couple occasions I have gotten a flat. This little inflator made quick work of inflating my tire so I can get home. It doesnt get me the 95 PSI I like to ride with, but it gets enough air in the tire to ride home. I do wish the foam insulator was a little thicker, especially on those cold mornings. Then again its already a tight fit getting all of my emergency supplies in my saddle bag and more insulation around this thing will make fitting everything in the bag even harder. So just wear gloves when you use it. The nozzle is quality made and is still working after multiple uses.Im interested to know what other cyclists carry in their saddle bags. when you write a review let me know what you carry in your emergency kit. Below Ive listed what I carry. Id just like to know what you carry.2 inner tubesCO2 Inflator with two CO2 cartridgesMini chain breakerchain linksA multi toolPatchesDrivers Licensea 20 dollar billTire levers2 Nutragrain Bars - These are for those times when I hit that wall and need a pick me upMy house keysNew-skin liquid bandage and a couple Band aids - I fell once trying to avoid a car that came around a bend not paying attention. Cut my arm and scraped my legs pretty good. I bled through my White Castelli jersey which to the day I have not been able to get the stain out of and anyone who rides know that Castelli gear is really expensive. So from that day forward I always carry the liquid skin and a couple band aids