Speedfil A2 and Z4+ Aerobundle Bicycle Water Bottle, Hands-Free BTA Hydration System with Refill Port

The straws are too long and you’ll need to cut them. When in aero position your arm can hit the straw and leak your hydration over you and your bike.

I know the reviews on this one have been mixed so I took a chance and bought the system. Yes the bottle cage holder stays attached between my narrow aerobars via zip ties. Totally secure and it works- it even stayed secure when I traveled with the bike on a plane. I was concerned the bottle might leak based on reviews. It did not- it work exceptionally well and I was able to refill on the fly during the race. You do need to take the time to assemble/ attach the straws properly. Once you do that you are golden. Could not be happier with this product.

Bought this after returning the Profile Design HC Aero (it would not fit between my aerobars b/c apparently they are too narrow). So, after reading other reviews, I thought I might give the between the arms options one more opportunity to impress me. For what ought to be a very simple and solid design, the A2/Z4+ falls short in the single, most important job--delivering the fluids. On my setup you can attempt to suck out liquid from the bottle all day long, but there appears to be poor sealing between the tubing and the elbow connector. Instead of getting good draws of liquid, you get almost all air. Not good. If I were not out of the country right now I would have returned this after the first try. I'm so tired of poor quality control...

Bottle cage is nice, but didn’t come with the adapter for the Garmin. You’ll need to add that yourself for an additional $10.

This product is way over price for its quality. I purchased this to have it on my race for my new tri-bike. On the race day I noticed that it is leaking. It messed with my braking system, and I had to stop twice in the aid station to clean. i almost had a crash on one turn since the brake was not working. I also used a pipe tape to fix the leaking, but I noticed the leak happen from the top part. I am extremely unhappy with the quality of this product. I need to pay a fortune to fix the front brakes now.

UPDATE FALL 2022 - Used for my 5X Ironman this fall. Still working great.UPDATE SUMMER 2017 - Used this to successfully complete Ironman Texas. 112 miles of non-stop riding on the Hardy Toll Road (side comment -- Best. Bike. Course. Ever. Closed to traffic and a super-smooth surface!). I grabbed bottles from volunteers when I rode through aid stations, slowed long enough to pour into the Speedfil, then stuck the empty bottle in my bottle cage and tossed at the next aid station.Worked brilliantly. I could drink in the aero position, no problem. Which was helpful, because almost exactly half the time we were riding into 25 - 30 mph winds. I was completely happy with my setup and would not change a thing.= = = = = =Added this to my bike while I was training for a full iron triathlon. IT IS THE BOMB.A simple, clever design. I still use my Camelbak Octane reservoir pack plus frame bottles plus this one for long summer rides (it's Texas, you gotta have water.)But for cooler training rides with plenty of water availability at gas stations, and actual events, this thing is fantastic.Dead easy to install -- you just use cable ties, so it works on pretty much any bike setup. I did remount my bike computer, but obviously that would depend on your own setup.Extremely secure once attached. I was skeptical beforehand, but it is rock-solid and that bottle is not going anywhere.And the straw/cap/bottle setup simply does not leak. Easy to refill with liquid (but not ice) -- there's a toggle sort of cap that just slides open and you can pour right in without taking it out of the cage.One of my best investments ever. I looked at the pricier systems like XLABS, TorHans, etc. First, they looked way more complicated to install. And second, they wanted special bottles. Too much fuss to bother with all that.

The design is perfect and I really wanted to love this but for whatever reason, I cannot get it to work for me. Because the computer mount is on the lower end of the cage, you really need to mount this very far forward on your aero bars in order to see your computer well. In this position, it interferes with your grip on the distal aspects of the aero bars. The solution, then, was to turn it around. However, because in that position it would slant downwards, it would leak (from the refill cap) with the fluid sloshing around and the straw was difficult to position well. I thought about flattening out the position of my aero bars but I don't want to sacrifice a fine-tuned fit for a water bottle. I'm still fiddling with it and am considering mounting it to my down tube and just buying the extra long tubing. A lot of work for something that should be just "mount and go". I should mention that I tried removing the computer mount and inserting it in the opposite direction, but the design is such that you can only insert it (the mount) from the bottom aspect of the cage. It would have been nice if they had made it reversible in that sense (but, there is a velcro strap to secure the bottle and a reversed orientation would interfere with that). So, if you can make it work for you, it is a great system.Update: found this review. He highlights some things that I've encountered as well. Worth a read if you are considering this set up. https://brittsblogging.wordpress.com/2014/03/21/speedfil-a2-review/

Once I got this set up on my bike, it was great. My advice: don't tighten the zip ties until you are certain you have it where you like it! I needed to use other zip ties because I kept re=positioning it. The refill door is a little tight, but it works fine. If you use Nuun tabs you will have to split them in half, otherwise they won't drop down the opening. This is a bit of a bummer in racing, but not a deal breaker by any means.Computer mount is the best. My numbers are right in my face.