CyclingDealBike Bottle Cage Saddle Mount Adapter for 2 Bottle Cages - MTB Road Bicycle Saddle Rail Mount Water Bottle Holder with Adjustable Angle - Aluminium Alloy Adapter for Road Use ONLY

I recently did a half Ironman race and the ride is 56 miles so I needed additional water bottle space and mounting one behind the seat is optimal because there's no wind resistance penalty behind the seat.This one is particularly useful to me because it holds one bottle I need in addition to the in-frame 20 ounces I have which is perfect for 56 miles for me.I wasn't a fan of the double C clamp shown in the product picture but it looks like they improved the design and I added a picture here to show you, it's very improved and mounts easily, adapting to the various angles of seat rails available today.It can be tilted in various angles as to your preference but I tilt it top-forward so it's easy to remove. (Which isn't easy when you're cranking a runaway triathlon bike so practice using it before race day.)Try one. It's great. (And nicely-priced.)

Came loose and I lost two bottle on first rise. Everything was tight before leaving. This thing cost me as I need new bottles now. Don't buy this.

I got the 2X bottle holder version of the adapter. I previously had one from different brand that always came loose eventually. This CyclingDeal adapter works great. It doesn't have any of those problems. The seat rail calm design works great. No coming loose. The design of the arms to attach the bottle cages works great as well and are adjustable. Overall it is well designed, sturdy, adjustable and lightweight. I highly recommend this! Best regards!

It has a bit of weight and stregth to it which gives the feel it can last through the abuse my bike will be put through when mountain biking. The bracket weighs 95g.It is a black alloy metal. I love that you also get 4 screws and washers for mounting the bottle cages. Very thoughtful. See video for full review.

The “Saddle-Mount for a Bike Bottle Cage” from “CyclingDeal” is an incredibly well-designed and wonderfully versatile mount for attaching a water bottle holder onto the rear of your bike, just below the saddle.Installation of the mounting bracket system is fairly straight-forward. It is a tad fiddly, but it’s a relatively simple design when you look at it and works wonderfully well.My kids both have junior mountain bikes. Neither of the bikes has anywhere to attach a bottle cage. This is frustrating, as during the summer months we like to go on long bike rides, so having a bottle of water to hand is essential. This ingeniously designed mount allows me to attach a bottle cage to the rear of their saddles, solving the problem!Once secured onto the twin saddle poles, the mount is incredibly secure. The set doesn’t come with a bottle cage, however, it does come with the two screws for securing a bottle cage to the mount.The overall quality of the mount is excellent. It’s lightweight but very sturdy and robust. All of the multi-positionable joints on the mount are locked tight using the included allen key.I’m really very impressed with the mount. It’s been on my kids’ bikes now for a good month or two and even when going off-road, it’s not come loose once. Very impressive.