Speedfil Z4/Z4+ Between-The-Arms (BTA) Water Bottle Cage with Computer Mount.

this thing is awesome - I get questions all the time on where to buy it. We have garmin 810s and its very secure. My wife took a pretty hard fall on the bike recently (she was largely fine) and no issues - computer stayed secure.

It attaches with zip ties? really? Other than that it works fine.

The material is plastic/nylon it feels like it will last, it's pretty light also. It can be attached to aero bars in different ways, if you are overly concerned that your bottle could get "ejected" it can be mounted the other way with the opening of the bottle facing you. The only thing may wear down are the zip ties which can be found in any hardware store cheap.My wife have used it in two tris with no problems whatsoever, her regular team bottle water fits tight. I'm getting one for me too.

The piece that the garmin mount clips into looks defective. The garmin clips in, but it won’t be long before my garmin launches off my bottle cage…. See pictures, the clips are not uniform. One piece has an overhang and looks like it is faulty plastic that is not very strong at all.

I have been using this bottle cage for about a year now and an overall fairly satisfied. It is mounted with zip ties, and I've gone through probably two-dozen zip ties over its life. If you hit a bump too hard, one of the zip ties tends to snap; however, I have never lost the cage, a water bottle, or my garmin. If your aerobars are sloped upwards, be sure to orient the bottle cage so that the bottom of the cage is facing you, that way the bottle will not fall out. Overall, this is an excellent lightweight option for your tri bike. I give it four stars because of the occasional zip tie pop.

Great product...been using speedfil products for over 6 years and I think they are still the best !!

Received today, seems like an ok product but was missing the drink tube clip and non-slip Velcro plug strap. Sloppy sales IMHO.

Avid triathlete here. The reason why I chose this drink method over the behind-the-saddle holders and even the original bottle placement on my seat tube is that between-the-arms solutions have been proven to be more aerodynamic. In my very cursory wattage comparison, I found that it saved me roughly 6 watts over a 5 kilometer flat segment that I was using as a testing ground. That is 6 watts savings over the behind-the-saddle option that I was using previously.