POWER BUNDLE EZ Aero Chainring & Front Derailleur Guard 6-10 Watt Saving - Flat faced chainrings only
BUNDLE Aero Chainring Guard & Front Derailleur Guard 6-10 Watt Saving
To confirm EZ Gains products are designed, manufactured and tested in the UK and conform to safety regulation.
EZ Power Chainring Guard (Patent Pending) 50T + Matt Black
This version is suited to flat face chainrings such as PCD, D2Z, Past Quest also Power meters which are fitted to the drive side of the crank Quark, 9200-P, R8100 -P etc.
Please see samples of Power Meters and Chainrings in the pictures section.
Smooth the airflow through your chainring for EZ aerodynamic gains and protect your chainring.
Please note the above product is not available for the 12 Speed Shimano Ultegra / Dura-Ace cranks arms, this is due to the large crank arm.
The Science "Press For Details"
- Save 3-5 Watts
- Weight 42 Grams (with tape)
- Aerodynamic Performance Tested at the Silverstone Wind Tunnel
- Made and Moulded in the UK
- Polycarbonate
Click on the link at the top of the page for fitting instructions.
"Crank arm holes cut to width"
Includes everything needed to fit including 3M tape x 2 carbon tape also included to go on crank arm opening if you choose.
BTF-ETU-ITU Used in Ironman Pro races and CTT races.
Used across events by thousands of athletes at high level pro and amatuer and has recently been inspected and passed at Ironman Frankfurt by a head official on a professional's bike, Ironman World Championships 2023, 2024, ITU World Championship 2023, 2024. ETU Champs 2023, 2024. National CTT races. Global Operations, Rules and Special Projects for Ironman confirmed he has no issues with the EZ Chainring Guard.
I would like to also confirm that the manufacturing of our products follows regulations: ISO14001 ISO9001.
Sizes may differ to give you the best fit. (EXAMPLE BELOW OF POWER METERS AND CHAINRINGS)
EZ Aero Front Derailleur Guard (Patent Pending)
"Avoid power failure due to weather conditions with the front derailleur guard, it has also been designed so that it protects derailleur from the wind throughout the whole range of movement".
Smooth the airflow of your front derailleur and save a massive 2-5.8 Watts across 30-50 kph.
On the 31st January 2023 at Silver Stone Sport Engineering Hub "wind tunnel"
EZ Gains independently had the EZ AFDG fully tested across YAW angles and 30/40/50kph wind speeds, and the results are out of the park.
50kph 5.8 Watts, 40kph 4 Watts, 30kph 2 Watts.
0 Yaw Watt Saving 30kph = 1.4 / 40kph = 4.1 / 50kph = 5.8
25 grams
Available for DI2 11 - 12 Speed Models - 105 / Ultegra / Dura ace / Mechanical 105 R7000 - Ultegra R8000 SRAM 11 -12 Speed.
(Please not the 12 speed DI2 version has 20% less mass than the 11 speed DI2 & SRAM 11-12 speed the Watt savings on the 12 speed DI2 will be less then above but still a large saving "predicted 20% less".
Please see the attached wind tunnel on science page.
Used in Ironman Triathlon, PTO Pro Field / BTF / ETU / ITU and inspected
Front Derailleur Guard
This has also been in use across events by hundreds of athletes high level pro and amatuer and has recently been inspected and passed at Ironman Frankfurt by a head official on a professional's bike and Ironman World Championships 2024, ITU World Championship 2024, ETU Championships.
Pairs well with
POWER BUNDLE EZ Aero Chainring & Front Derailleur Guard 6-10 Watt Saving - Flat faced chainrings only
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
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Customer Reviews
Aero chainring does not fit although I give all the correct measurements (using standard Sram Red Chainset). The reply email solution was to cut around the chainring aero cover to make it fit, also cut a whole for the chainguard aswell. I don't mind doing this to some extent, however I am reluctant to chop away with a pair of scissors unprofessionally for a product I paid good money for.
Hi Daryl, I have no idea who replied to you but apologise for this, as its the correct size to go to the edge of you chainring, you just need to pop off the power meter plastic cover as per instructions:
Take your chainring, your EZ Aero Chainring Cover (EZ-ACC) and quality double sided tape (we recommend 3M)
Best results remove crank 'but this is not essential'
Remove pedal, practice lining up EZ-ACC. Use pencil and ruler if needed to locate centre point, and if possible mark round with a marker.
Please remove plastic cap cover on your power meter if you have one, otherwise the chainring guard will not fit.
Clean chainring with wipe, remove any grease, wipe with cloth and dry.
Line up EZ-ACC, remove tape cover and press down firmly to secure the tape for 30-60 seconds making sure all points have made contact. Adjust slightly if needed.
It takes 24h for the tape to set. Over this period make sure every point has taken firmly.
Please also note, that carbon effect tape will be supplied, this is to close any gaps between the Chainring Guard and Crank arm, you can use a hairdryer to help shape this.
My name is Clint I am the owner please email me on sales@ezgains.co.uk happy to jump on a call straight away to resolve this.