Experience with Specialized Air Tool MTB Mini hand pump or CPRO2 CO2 gauge trigger?

[Jeremy McCreary]

Anyone have experience with the following Specialized tire accessories?

1. Considering the $30, 60 psi, 55 cc/stroke hand pump below for the tubeless 38 mm Pathfinder Pros on my Vado SL 1. Comes with a holder I'd mount on my currently unused top-tube bottle bosses.

Air Tool MTB Mini Pump

Small, efficient, reliable—the three key features of the Air Tool MTB Mini pump. With the inverted dual chamber design, this pump moves 20% more air per...

www.specialized.com

2. Also considering this $35 CO2 trigger with gauge. Have yet to actually use CO2, but this looks a lot more convenient than the MSW CO2 adapter I already have.

CPRO2 Gauge Trigger

The easiest way to use CO2.

www.specialized.com

Open to similarly priced alternatives. Thanks!

 

[fooferdoggie]

I dont like screw on co-2 fillers they can unscrew the core.

 

[Jeremy McCreary]

I dont like screw on co-2 fillers they can unscrew the core.

Good point. But do you know for a fact that the CPRO2 screws onto the tire valve? The product blurb doesn't say.

 

[Stefan Mikes]

1. Considering the $30, 60 psi, 55 cc/stroke hand pump below for the tubeless 38 mm Pathfinder Pros on my Vado SL 1. Comes with a holder I'd mount on my currently unused top-tube bottle bosses.

Air Tool MTB Mini Pump

Small, efficient, reliable—the three key features of the Air Tool MTB Mini pump. With the inverted dual chamber design, this pump moves 20% more air per...

www.specialized.com

I own this pump and do not use it at all. Perhaps my hands are too weak but I couldn't pump anything with it.

What I do use is this larger pump called Topeak Mountain Twin Turbo G. It can deliver up to 58 psi, which is fine for all my purposes. Each stroke (both directions) produces the air. The pump is designed to produce a large volume of air fast. The gauge shows you precisely where you are. However, I have never tried to mount this MTB pump on any of my e-bikes (I carry it in a pannier).

2. Also considering this $35 CO2 trigger with gauge. Have yet to actually use CO2, but this looks a lot more convenient than the MSW CO2 adapter I already have.

CPRO2 Gauge Trigger

The easiest way to use CO2.

www.specialized.com

I haven't used a CO2 inflator yet. It is not your regular bicycle pump! The purpose is to rapidly boost a tubeless tyre pressure when you have lost all the air from the tyre, and especially after the tyre bead fell off the rim. After you have determined the cause of the flat, you simply press the nozzle of the inflator against your Presta valve (I don't think you need to screw it onto the valve!) and open the inflator valve. You are getting a high boost of pressurised CO2, which is as strong as it will "shoot" the tyre bead back onto the rim. It is not possible to do it with a regular pump.

I resigned from the tubeless system because I realised I should the best own a compressor at home to be able to fully maintain the tubeless system. If I kept the tubeless, I would carry both a CO2 inflator and a pump.

What I bought, however, (but never used) was a tubeless CO2 repair kit. The tool has a large "needle", a set of "bacon strips", and a CO2 refill system. You use it if the hole in the tyre is as big as you must seal it. Please watch YT videos on "CO2 tubeless repair kit". I want to make it clear the CO2 repair kit is not the same as the CO2 inflator. The former is to close the hole and refill the tyre with a boost (through the hole in the tyre) while the latter is for just reinflating the tyre post a serious loss of air (through the valve).

 

[Stefan Mikes]

Jeremy: an extra information for you.

Most tubeless punctures are not severe and seal themselves fast. Any pressure loss can be compensated by a regular bike pump. In my worst case (e-MTB) the puncture caused by a piece of quartzite was severe. I lost half the pressure by the time the sealant closed the hole. My Twin Turbo was sufficient to reinflate the wheel. However, the total air loss is dangerous because the tyre bead might separate from the rim. In such case, the CO2 inflator is a must.

 

[Base]

When on the road we use a topeak roadmorph with dial. For the office rides mostly a CO2 cannister and a Lezyne mini pump in the luggage.

You could also opt for https://www.topeak.com/global/en/product/1737-E-BOOSTER-DIGITAL small, as easy to use as CO2 and pumps to your settings of psi or bar. Just use it every now and than so that you do not forget to charge it.

 

[fooferdoggie]

Good point. But do you know for a fact that the CPRO2 screws onto the tire valve? The product blurb doesn't say.

not positive but the barrel is knurled so that looks like it will screw on.