ZEFAL Air Gizmo Universal CO2 Bicycle Pump for Two Cartridges

I'm pretty impressed with this little cartridge holder. Did 22 miles on a local trail and had no retention issues. It's convenient to have on the bike rather than putting the cartridges in my jersey. Makes a nice gift item for your buddies too.

Pretty good. A few issues. First, you'll probably need to remove the velcro strap, flip it around, then rethread it through the rubber block before trying to attach it to your frame. I'm not sure why, but the way mine came packaged, they were backwards. I've use Zefal stuff a lot over the years and figured it out right away... but someone else might drive themselves slowly insane trying to figure out how the velcro is supposed to attach. Secondly, I can't figure out why the little plastic doohickey made to hold the CO2 cartridges is only threaded on one side. The other hole is just a hole. You're supposed to use your CO2 nozzle on the unthreaded side I take it... but mine just wouldn't thread on tight enough without puncturing the seal to leave it like that. If both sides were threaded, you could still attach a nozzle (depending on the brand) and if you decided to use it without attaching one, both sides would hold the cartridges more securely. You can mount these onto your seatpost or seat tube pretty securely. Others have said when it rains, they slip... I'm pretty sure mine would be fine.

i like this item because its pretty simple but when the tube get wet it tent to swipe down depending on the CO2 cartridge weight.

It does look cool but you have to be extra careful of how you install it or you gonna end up dropping it while you ride I just wish it came with a rubber band so it doesn’t move or giggle around

Does a great job holding CO2 cartridges on the seatpost of my mountain bike.

Great product, Highly recommended!

Junk- won’t securely hold cartridges. Buy something else.

WORKS FINE.

La idea es muy buena. La marca de confianza, pero este producto a mi no me convence. Cinta de velcro con una pieza que ajusta a la tija del sillin para dos botellas de CO2. El problema para mi es la pieza, no es de caucho que es como deberia, es de un plastico blando que no ternina de agarrarse a la tija ni a las botellas teniendo en cuenta que casi todas vienen con pegatina. Soltarse no se suelta pero se desliza hacia abajo, no he querido probar en rutas cañeras y bacheadas sin tomar precauciones y directamente la he bajado apoyando las botellas en el cierre de la tija y con un trozo de espuma fina pegada en la base de la botella para evitar ruidos de choques de metal. Con la pieza en caucho blando habria sido perfecta .

Installazione facile, il materiale in gomma aderisce in modo molto stabile sia al tubo sella sia agli accessori che supporta (nel mio caso una bomboletta riparazione ed una piccola pompa a mano). Dopo 100km su sterrato il supporto e gli accessori non si sono mossi di un millimetro.

El producto cumple, sujeta suficientemente bien y no es complicado de poner, la unica pega es que las botellas 25grs no puedes ponerlas y en ningun lugar de la descripcion del articulo te lo especifica, quedan muy forzadas.

Es muy útil para llevar el adaptador y hasta dos botellas de CO2, ajusta muy bien en tijas redondas, pasable en tijas tipo D y mal en tijas aero.Lo suelo montar en rutas donde es necesario llevar 2 bidones de agua y me toca quitar el bidón portaherramientas. LLevar el CO2 en los bolsillos del maillot no es una opción.Cuidado con perder el anclaje pequeño, sin el el soporte no vale para nada.

Questo " coso" serve a portare 2 bombolette di co2 e si può attaccare sia al cannotto del sellino che al telaio della bici, ha una fascia a strappo che ha un' inserto catarifrangente. Ottimo! Io ci faccio Hall Mountain con discese molto serie e non ho mai perso le bombolette. Uso co2 da 16 gr.