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Trademarks and Registered Designs®
THE FASTEST & SAFEST TESTED REAR BOTTLE HOLDER
TRUSTED BY THE BEST ATHLETES IN THE WORLD.
Introducing the Universal Metal Rail Mount.
If your saddle is not listed here then the universal mount is the one for you.
Science & Performance
Engineered for elite performance and trusted by the world’s best athletes, the EZ Hydro-Gains rear bottle mount leads the industry in both speed and safety.
Proven Strength & Reliability
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Load tested to 33 lb (15 kg)
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Over 1,500,000 km of real-world road testing using 750ml bottles
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Built for stability in all conditions, from training roads to world-class race environments.
- ISO Manufacture Accredited / WT & IM Legal
Precision-Fit for Every Saddle
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For metal rail version saddles
- All screws for every fitting size
- Carbon and top quality reinforced HP Jet Fusion 5210 Technology
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Saddle Clamps can range from 25mm to 60mm rail widths on the rear of the saddle
- Angle adjustable rail support system
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Clamps to the contour of your rail, unlike other universal mounts, Reduced rail distortion
- Position over saddle with a variety of spacers for the best possible fit.
- Range of fin positioning not fixed to one position
- Variable angle of fin
- Variable position of bottles move back and forward for optimal aero performance as close to the bottom as possible
- Bottle can be placed in either direction for easier access to hydration.
- Adaptable to fit ranges of saddles with extra saddle spacers provided.
Trusted by the Best
With 4,000 , EZ Hydro-Gains has become the go-to choice for top athletes, including:
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The Men’s 70.3 World Champion
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The Men’s 140.6 IRONMAN World Champion
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The Women’s IRONMAN 140.6 World Champion
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And over 400 top professional triathletes worldwide
If you’re serious about rear hydration and free speed, this is the setup you need.
Single & Double Options
Order the Double Mount and switch instantly between:
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Double-bottle configuration
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Single-bottle configuration
Interchangeable on demand.
Optional Short Nose Fin
If you ride at the very back of the saddle and prefer a fin that does not extend past the rear edge:
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Place your order as normal
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Add “short nose fin” in the order notes
We customise it for your riding position.
The purchase is for the Hydro-Gains Rear Bottle Holder Fin & Saddle Clamp Unit and does not include any saddles or bottle cage, it does come with elastics to help keep your bottles in place if required.
Individually fitted to each seat design !
Features & Benefits of EZ Hydro-Gains
- Faster than no bottle and standard rear hydration setups
- Probably the fastest rear hydration system available.
- ISO/BSI Manufacture Accredited - Meeting all safety standards
- Bottle position movement 0–25 degrees.
- Bottle position movement back and forward.
- Securely holds your hydration as well as adding extra watts.
- Interchangeable saddle mounts
- EZ to Rack
- Manufactured for your seat – best fitting, will not move about.
- Securely holds bottle – added elastic pull for added security.
- Race number area.
- Double bottle mount available.
- Interchangeable Single / Double
- A great marker point for optimal position on seat
- 22cm x 9 cm
- 150g
- Ironman, World Triathlon, German Rules Legal, PTO Legal
Please check out our science page for more information.
"Ironman Triathlon and World Triathlon have confirmed that EZ Hydro-Gains is legal to use in draft–illegal races and conforms to safety standards set out (BSI -ISO9001-ISO14001 5.03 Ironman (World Triathlon) exceeding the standards of a reputable safety standards organization (such as CPSC, ISO, or other equally reputable safety standards organizations)"
Email us your saddle information to be added to the waiting list.
Trade mark no: UK00004217827 Registered Designs UK,EU and US Patent Pending 30/034,780 - Design Patent Australia Pending .Hydro-Gains Trade Marked ® Triathlon & Time Trial Approved-ISO BSI Manufacture Regulated to the highest 3D Print Quality Standard
12 Month Warranty on a defective product - Please contact us if you have an issues.
Pairs well with

EZ Hydro Gains® (Universal Metal Rail Mount) Pre-Order 17th April
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
Shipping Information
OPTION FOR DUTIES & TAXES PAID to EU (Check FAQs)- USA, UK, CANADA. AUSTRALIA, JORDAN, KUWAIT, NEW ZELAND, OMAN, QATAR, SAUDI ARABIA, SINGAPORE & UAE = Duties Paid
Customer Support
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FAQ’s
Whether it's product, shipping or general EZ Gains information, take a look at our FAQs page for answers to your questions.
Contact Us
Drop us an email via our Contact Us page and we'll get back to you shortly.
