My original Fizik Holder broke right before my IRONMAN. The Hydro Gains is much stronger and gives me aerodynamic advantages.

The best part: The customer service sent out the package with priority, so that there was enough time for me to test everything.

Thank you very much!

I'm a competitive age-group triathlete — 3× GB Age Group World Championships qualifier, sub-1hr Ironman swimmer. I don't buy swim gadgets on faith — I test them.
I ran the EZ Hydro-Glide across three sessions: two pool tests (400m time trial + 6×100m intervals) and one open water session. Every session was a solo effort — no feet in front, no drafting advantage.
The numbers:

Pool 400m TT: 5:30 with device vs. 5:36 PB without — 6 seconds faster
Pool 100m intervals: consistent ~5 sec/100m improvement across all reps
Open water 550m loop: ~5 sec/100m improvement vs. pre-device baseline

The consistency is what stands out. This isn't one lucky swim — it's the same result across different formats, distances, and environments (pool and open water, with and without wetsuit).
The mechanism makes sense when you think it through. The device puts your head in an optimal position and breaks the water more hydrodynamically. Better head position cascades through the whole body — it lifts your torso, which raises your hips, which reduces drag at the hip and kick zone. The whole body sits higher and flatter in the water, and you're faster as a result.
Caveats: This is personal testing, not a controlled study. Sample size is three sessions. I'd want more data before drawing firm conclusions about long-term adaptation. But as an initial result? It's compelling enough that I'll be wearing it at my next start line.
At 5 sec/100m over a 3.8km Ironman swim, that's roughly 3 minutes off my swim split. My current Ironman swim PB is 57:14 — that puts a sub-54 in range. In a sport where every minute saved in the water means fresher legs on the bike and run, that's not a marginal gain.

Perfect fit with my ISM PN 3.0 saddle and very secure. These guys ship fast, ordered a week out from a 70.3 and surprisingly showed up 2 days before. Not much practice with it but worked out great. Love the adjustability.

Aero Chainring Guard Tape

Works well, and fitted my wheels perfectly.

The instructions (as of May 2026) are very poor but EZ Gains email support was very quick and helpful (over a bank holiday weekend!) and I understand the instructions are being re-written.

It's actually quite simple to fit, and so far it's been secure with no rattles.

Sadly not (yet) homologated for UCI-regulated track events, but OK for non-UCI events.

Great to support a pioneering UK business that offers genuinely excellent customer service.

Great addition to my tt bike setup. Very solid mount with great bottle retention. Stable during rides and keeps hydration accessible behind the saddle. The Hydro Gains fits neatly between the aerobars, keeps hydration accessible clean designs , easy access bottle and looks very aero. Stable on rides. Excellent product. Great upgrade for my race 👍❤️🔥🔥

Well designed and built. It gives you endless adjustability on angle and fore/aft to get the bottle in exactly the right place for you. I like the fact its so easy to fit and has been great to use on training rides this year. I look forward to using it for lots of long course racing this year!

I had a couple of issues when making a recent purchase. The phone was answered promptly, helpful information was given and they managed to sort out what could have been complicated issues re my purchase and billing address without fuss.. I even received a text message at 7am to say it would be sorted as soon as Chris? got into the office. Unfortunately service and responses like this have become rare. Company’s forget that their USP is not just the product but dealing with customer related issues. EZ gets 10 out of 10 here. Keep up the good work.

Dr Dave.

Great customer service. I ordered for the wrong saddle. I have an ISM PN 1.1 but ordered for the PS 1.1.
I returned the fitting after great communication and had the replacement back in time for a weekend race.
Thanks.

The team was incredibly helpful, professional, and responsive throughout the whole process. Excellent customer support, fast communication, and truly high-quality service. A pleasure to deal with, highly recommended!

I am honestly a bit disappointed to say that the compression is lacking. The shipping was fast and the materials seem nice, but I will likely end up reselling them because the compression simply is not sufficient. I would be concerned that the calf section might slip down during a race, even with the rubber band. I am, by all measures, a normal size, healthy and fit woman with standard calf measurements. This just feels like a bit of a bummer :-(

Excellent support and a very good fit. It doesn't wobble at all. Assembly was easy after watching the video. It adjusts very well to the saddle. The saddle in the photo is a Fizik Transfiro Aeris, but I bought two more for two different saddles (Bontrager Hilo and ISM 3.0). They all fit excellently. The service provided, from purchase to assembly, was exceptional.

Will be recommending this to everyone I know. Best on the market simple, slick and fast. Thank you Ez Gain Team for helping me!!!

Having used the included rear mount from Fizik - which broke on a previous triathlon, I was super pleased to see EzGains make a specific adaptor for the Fizik Aeris saddle for their EZ hydro system - and it didn’t disappoint…
Along the pretty bumpy and sometimes rough Valencia 70.3 course I saw so many ejected bottles and yet still had mine… plus I was almost 30mins faster than last time - that’s some Gains…

Firstly, my order arrived (Saudi Arabia) with ease and the installations was flawless. Tested several times now and yes it’s very impressive on flat route and although I gained few grams extra but it’s barely noticeable on climbs. The aero I gained is worth the upgrade even on headwind and crosswinds.